Conditions by Prevalence
Conditions here are listed
according to
prevalence, which is the estimated number
of people who have the condition at a given time.
This measure may differ from the incidence of the condition,
which refers to new annual cases,
and the rates below do not include incidence data in computations.
For comparison, see conditions by people affected (prevalence
or incidence),
and conditions by incidence.
See also details about prevalence and incidence statistics
for more information.
In most cases, rates refer to the USA
or other industrialized nations.
| Condition | Percent | Rate | US People | Data |
| 1. Respiratory conditions | 78.90% | 1 in 1 | 214.6 million | 78.9 per 100 (NHIS96) |
| 2. Cytomegalovirus | 50.00% | 1 in 2 | 136 million | 50% approximately; almost half of young adults (NIAID) |
| 3. Cold sores | 50.00% | 1 in 2 | 136 million | estimated 50 to 80% of Americans have HSV-1 |
| 4. Refractive Eye Disorders | 44.12% | 1 in 2 | 120 million | 120 million people |
| 5. High Cholesterol | 37.13% | 1 in 3 | 101 million | estimated 101 million Americans have cholesterol >= 200 mg/dL (CDC) |
| 6. Overweight | 35.70% | 1 in 3 | 97.1 million | 97.1 million American adults |
| 7. Chronic Illness | 33.09% | 1 in 3 | 90 million | 90 million people in USA (CDC) |
| 8. Myopia | 25.74% | 1 in 3 | 70 million | 70 million Americans; over 25 percent of all adult Americans. |
| 9. Insulin Resistance | 25.00% | 1 in 4 | 68 million | about 25% of the USA population have insulin resistance |
| 10. Metabolic Syndrome | 25.00% | 1 in 4 | 68 million | about 25% of the USA population have insulin resistance |
| 11. Genital herpes | 24.63% | 1 in 4 | 67 million | 67 million people (NIAID) |
| 12. Sexually Transmitted Diseases | 23.90% | 1 in 4 | 65 million | 65 million people living with an incurable STD (CDC) |
| 13. Cardiovascular diseases | 22.72% | 1 in 4 | 61.8 million | 61,800,000 cases in the USA (American Heart Association, 2004) |
| 14. Hyperopia | 22.40% | 1 in 4 | 60.9 million | 22.4% of population self-reported having long-sightedness in Australia 2001 (ABS 2001 National Health Survey, Australia’s Health 2004, AIHW) |
| 15. Smoking | 22.30% | 1 in 4 | 60.7 million | 22.3% of Americans smoke (CDC); 23 million American women smoke (NHLBI) |
| 16. Toxoplasmosis | 22.06% | 1 in 4 | 60 million | More than 60 million in USA but few have symptoms (DPD) |
| 17. Digestive Diseases | 22.06% | 1 in 4 | 60 million | 60 to 70 million cases in the USA 1985 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447) |
| 18. Epstein-Barr virus | 20.00% | 1 in 5 | 54.4 million | as many as 20% of people carry the virus in their throats |
| 19. Hypertension | 18.38% | 1 in 5 | 50 million | 50 million Americans (NHLBI); 217 per 1000 (NHIS95) |
| 20. Dandruff | 18.38% | 1 in 5 | 50 million | 50 million |
| 21. Allergies | 18.38% | 1 in 5 | 50 million | 50-60 million (NIAID); 9-16% (NIAID); 50 million cases annually (NIAID); 10% of American women (NHWIC); 8,526,000 children respiratory allergies (NHIS-97); 7,304,000 children non-respiratory allergies (NHIS-97) |
| 22. Headache | 16.54% | 1 in 6 | 45 million | 45 million Americans get chronic headaches. 20 million American women (NWHIC). |
| 23. Chronic headache | 16.54% | 1 in 6 | 45 million | estimated 45 million Americans (NINDS) |
| 24. Astigmatism | 16.54% | 1 in 6 | 45 million | 45 million Americans (dubious estimate based on "two thirds of people with myopia also have astigmatism") |
| 25. Anxiety Disorders | 16.40% | 1 in 6 | 44.6 million | estimated 16.4% adults (USSG); 19.1 million American adults (NIMH); 13.3% of adults (NIMH) |
| 26. Impaired glucose tolerance | 15.07% | 1 in 6 | 41 million | estimated 41 million people aged 40-74 have pre-diabetes in the US 1988-94 (National Diabetes Statistics fact sheet, NIDDK, 2003) |
| 27. Premenstrual syndrome | 15.00% | 1 in 6 | 40.8 million | 30-40% women suffer some impairment of daily activity (NWHIC); 75% women have some symptoms; 3-8% women have severe PMS (NWHIC). |
| 28. Orthopedic disorders | 14.90% | 1 in 6 | 40.5 million | 149 per 1000 - NHIS95 |
| 29. Sleep disorders | 14.71% | 1 in 6 | 40 million | approximately 40 million Americans (NHLBI) |
| 30. Obesity | 14.63% | 1 in 6 | 39.8 million | 39.8 million American adults; more than 57% of American adults are overweight (CDC) |
| 31. Arthritis | 13.60% | 1 in 7 | 37 million | 37 million Americans (NIAMS) |
| 32. Sinusitis | 13.60% | 1 in 7 | 37 million | 37 million annually in the USA; 33 million reported to CDC (NIAID) |
| 33. Hay fever | 12.87% | 1 in 7 | 35 million | 35 million Americans (NIAID: pollen allergies) |
| 34. Pollen allergy | 12.87% | 1 in 7 | 35 million | estimated 35 million Americans with pollen allergies (NIAID) |
| 35. Chronic Sinusitis | 12.60% | 1 in 7 | 34.3 million | 12.6% (NIAID); 152 per 1000 - NHIS95 |
| 36. Insomnia | 11.76% | 1 in 8 | 32 million | 32 million (unreliable estimate) |
| 37. Chronic lower respiratory diseases | 11.76% | 1 in 8 | 32 million | estimated 32 million including 15 million undiagnosed |
| 38. Lung conditions | 11.03% | 1 in 9 | 30 million | more than 30 million Americans with chronic lung diseases (NWHIC) |
| 39. Impotence | 11.03% | 1 in 9 | 30 million | 30 million men (NIDDK) |
| 40. Lactose Intolerance | 11.03% | 1 in 9 | 30 million | 30 million people to 50 million people (NIDDK 1994); about 25% of population (1994/NIDDK) |
| 41. Osteoporosis | 10.29% | 1 in 9 | 28 million | 28 million Americans (10 million with osteoporosis; 18 million with low bone mass); eight million American women and 2 million men (NWHIC) |
| 42. Migraine | 10.29% | 1 in 9 | 28 million | 28 million Americans (NINDS) |
| 43. Moles | 10.00% | 1 in 10 | 27.2 million | common; most people have 10-40 moles. |
| 44. Molluscum contagiosum | 10.00% | 1 in 10 | 27.2 million | Common. |
| 45. Scabies | 10.00% | 1 in 10 | 27.2 million | common |
| 46. Retroverted uterus | 10.00% | 1 in 10 | 27.2 million | about 1 in 5 women |
| 47. Subfertility | 10.00% | 1 in 10 | 27.2 million | about 1 in 10 couples |
| 48. Allergic rhinitis | 10.00% | 1 in 10 | 27.2 million | 10% of the population with allergic rhinitis/hay fever in the US (Mayo Clinic) |
| 49. Otosclerosis | 10.00% | 1 in 10 | 27.2 million | as many as 10% of Caucasians have the condition but most do not get symptoms; about 1 in 100 cases actually lose hearing from otosclerosis |
| 50. Extra Nipples | 10.00% | 1 in 10 | 27.2 million | about 1 in 10 people but most are small and mistaken for freckles or moles |
| 51. Depressive disorders | 9.50% | 1 in 10 | 25.8 million | 9.5 percent of adult Americans (NIMH) |
| 52. Rare diseases | 9.19% | 1 in 10 | 25 million | about 25 million Americans (ORD); each disease less than 200,000 Americans by definition. |
| 53. Presbyopia | 9.00% | 1 in 11 | 24.5 million | 9.0% of population self-reported having presbyopia in Australia 2001 (ABS 2001 National Health Survey, Australia’s Health 2004, AIHW) |
| 54. Back Impairment | 8.50% | 1 in 11 | 23.1 million | 85 per 1000 - NHIS95 (deformity or orthopedic impairment of back) |
| 55. Heart disease | 8.09% | 1 in 12 | 22 million | 22 million adults in the US 2000 (Centers for Disease Control and Prevention) |
| 56. Hearing Impairment | 8.09% | 1 in 12 | 22 million | 22 million; 158 per 1000 (NHIS95) |
| 57. Thyroid disorders | 7.35% | 1 in 13 | 20 million | 20 million Americans (NWHIC) |
| 58. Human Papillomavirus | 7.35% | 1 in 13 | 20 million | 20 million Americans currently infected (NIAID; CDC 2001) |
| 59. Osteoarthritis | 7.35% | 1 in 13 | 20 million | 20 million people (NIAMS); more than 16 million people (NWHIC) |
| 60. Mood disorders | 7.10% | 1 in 14 | 19.3 million | estimated 7.1% adults (USSG) |
| 61. Ischemic heart disease | 6.80% | 1 in 14 | 18.5 million | 68 per 1000 (NHIS95) |
| 62. Sleep apnea | 6.62% | 1 in 15 | 18 million | estimated 18 million Americans (NHLBI) |
| 63. Asthma | 6.40% | 1 in 15 | 17.4 million | 6.4% USA (NIAID); 17 million Americans (NIAID) including 5 million children; 8.1 million children (NHIS-97), 51 per 1000 - NHIS95; 14.5 million; 5% of population (NWHIC); 14.9 million in 1995 (NHLBI) |
| 64. Acne | 6.25% | 1 in 16 | 17 million | 17 million Americans, almost 85% of people 12-24 years of age. |
| 65. Diabetes | 5.88% | 1 in 17 | 16 million | 16 million Americans with 10.3 million diagnosed and 8.1 million women (NWHIC); 65 per 1000 - NHIS95; 8 million - perhaps 16 million if include not-yet-diagnosed. |
| 66. Type 2 diabetes | 5.88% | 1 in 17 | 16 million | 16 million Americans (NWHIC, includes undiagnosed); 7.2 million (actually diagnosed) |
| 67. Gallstones | 5.88% | 1 in 17 | 16 million | 16 to 22 million people in the USA 1976-87 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, US Government Printing Office, NIDDK, 1994) |
| 68. Alcoholism | 5.55% | 1 in 18 | 15.1 million | estimated 15.1 million people: 15.1 million alcohol-abusing or alcohol-dependent individuals and 4.6 million are women (NWHIC); nearly 14 million Americans (NIAAA) |
| 69. Alcohol abuse | 5.55% | 1 in 18 | 15.1 million | estimated 15.1 million people: 15.1 million alcohol-abusing or alcohol-dependent individuals and 4.6 million are women (NWHIC); nearly 14 million Americans (NIAAA) |
| 70. Eczema | 5.51% | 1 in 18 | 15 million | 15 million people (NIAMS); 10% infants/children estimated (NIAMS); 9% (NIAID); 8.5 million |
| 71. Gynecomastia | 5.51% | 1 in 18 | 15 million | 15 million - 15% of adult men to some extent (unreliable estimate) |
| 72. Heartburn | 5.51% | 1 in 18 | 15 million | 15 million Americans have it daily (NIDDK) |
| 73. Depression | 5.30% | 1 in 18 | 14.4 million | estimated 5.3% adults (USSG); 17 million people; approximately 4% of adolescents get seriously depressed (NIMH); annually 12% of women ; 7% of men; lifetime risk of an episode for women 20%. 3-4 million men USA. |
| 74. Arrhythmias | 5.30% | 1 in 18 | 14.4 million | 53 per 1000 (NHIS95: heart rhythm disorders); 21 per 1000 (NHIS95: heart murmurs) |
| 75. Urinary stones | 5.20% | 1 in 19 | 14.1 million | 5.2% of adults in the USA 1988-1994 (Weighted Analysis of 1988-1994 National Health and Nutrition Survey, 2003) |
| 76. Raynaud's phenomenon | 5.00% | 1 in 20 | 13.6 million | 5-10% (NIAMS estimate). Scleroderma-related disorders including Raynaud's phenomenon between 250,000 and 992,500. |
| 77. Uterine fibroids | 5.00% | 1 in 20 | 13.6 million | 10-20% women (NWHIC) |
| 78. Endometriosis | 5.00% | 1 in 20 | 13.6 million | 10 to 20 percent of American women of childbearing age have endometriosis (NIDCD); up to 2 million women in the UK. |
| 79. Red-green color blindness | 5.00% | 1 in 20 | 13.6 million | about 10% of males |
| 80. Chronic Obstructive Pulmonary Disease | 4.96% | 1 in 20 | 13.5 million | 13.5 million Americans (NHLBI) |
| 81. Coronary heart disease | 4.85% | 1 in 20 | 13.2 million | estimated 13,200,000 in the USA 2001 (American Heart Association, 2004) |
| 82. Urinary Incontinence | 4.78% | 1 in 20 | 13 million | 13 million adults (NIDDK); 1 in 10 over 65 (NWHIC). |
| 83. Rosacea | 4.78% | 1 in 20 | 13 million | 13 million people in the United States (NIAMS) |
| 84. Varicose veins | 4.50% | 1 in 22 | 12.2 million | 45 per 1000 (NHIS95) |
| 85. Tinnitus | 4.50% | 1 in 22 | 12.2 million | 45 per 1000 (NHIS95); 12 million Americans |
| 86. Chronic Bronchitis | 4.45% | 1 in 22 | 12.1 million | 12.1 million Americans (NHLBI) |
| 87. Obstructive sleep apnea | 4.41% | 1 in 22 | 12 million | 12 million Americans |
| 88. Genetic Disease | 4.41% | 1 in 22 | 12 million | 12 million Americans - unreliable estimate, (perhaps 2.5% births) |
| 89. Phobias | 4.23% | 1 in 23 | 11.5 million | 11.5 million adults (NIMH); 8.0% adults (NIMH) |
| 90. Cornea disorders | 4.04% | 1 in 24 | 11 million | 11,000,000 people experience corneal disorders such as herpes or dry eye in the US (Research to Prevent Blindness, NISE, NSF) |
| 91. Dysthymia | 4.01% | 1 in 24 | 10.9 million | about 10.9 million American adults (NIMH); estimated 1.6% adults (USSG) |
| 92. Presbycusis | 3.90% | 1 in 25 | 10.6 million | 30-35% over 65 have some hearing loss, 40-50% over 70. |
| 93. Hemorrhoids | 3.82% | 1 in 26 | 10.4 million | 10.4 million people in the USA 1983-87 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 94. Latent tuberculosis | 3.68% | 1 in 27 | 10 million | estimated 10 to 15 million people in USA (NIAID) |
| 95. Jaw conditions | 3.68% | 1 in 27 | 10 million | estimated 10 million women in the USA (NWHIC) |
| 96. Age-related macular degeneration | 3.68% | 1 in 27 | 10 million | 10,000,000 people have reduced vision due to age-related macular degeneration in the US (Research to Prevent Blindness, NISE, NSF) |
| 97. Indigestion | 3.50% | 1 in 28 | 9.5 million | 35 per 1000 - NHIS95 (frequent indigestion) |
| 98. Dermatitis | 3.30% | 1 in 30 | 8 million | 33 per 1000 (NHIS95) |
| 99. Insect sting allergies | 3.30% | 1 in 30 | 8 million | 3.3% (NIAID); up to 5% of the population (NHWIC) |
| 100. Bursitis | 3.20% | 1 in 31 | 8.7 million | 32 per 1000 (NHIS95) |
| 101. Autoimmune diseases | 3.13% | 1 in 31 | 8.5 million | 8,511,845 people in the USA 1996 1 |
| 102. Dry skin | 3.10% | 1 in 32 | 8.4 million | 31 per 1000 - NHIS95 (trouble with dry/itching skin) |
| 103. Disc Disorders | 3.10% | 1 in 32 | 8.4 million | 31 per 1000 (NHIS95: intervertebrate disc disorders) |
| 104. Paget's disease of bone | 3.00% | 1 in 33 | 8.2 million | about 3% of people aged over 40; 10% by age 80. |
| 105. Congenital conditions | 3.00% | 1 in 33 | 8.2 million | 3-4% of babies (NWHIC) |
| 106. Gastroesophageal Reflux Disease | 3.00% | 1 in 33 | 8.2 million | 3-7% of the population in the USA 1985 for "GERD and related esophageal disorders" (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 107. Urinary tract infections (child) | 3.00% | 1 in 33 | 8.2 million | 3% of girls and 1% of boys before age 11 |
| 108. Cerebrovascular Conditions | 3.00% | 1 in 33 | 8.2 million | 30 per 1000 - NHIS95 |
| 109. Heart attack | 2.76% | 1 in 36 | 7.5 million | 7.5 million people with AMI (NHLBI) |
| 110. Squint | 2.76% | 1 in 36 | 7.5 million | 7,500,000 people suffer from strabismus or cross eyes in the US (Research to Prevent Blindness, NISE, NSF) |
| 111. Kidney disease | 2.72% | 1 in 36 | 7.4 million | 7.4 million adults in the USA 1988-94 (American Journal of Kidney Disease) |
| 112. Prostate conditions | 2.60% | 1 in 38 | 7.1 million | 52 per 1000 men - NHIS95; 2,803 million men (NIDDK) |
| 113. Ingrown nails | 2.60% | 1 in 38 | 7.1 million | 26 per 1000 - NHIS95 (trouble with ingrown nails) |
| 114. Callus | 2.50% | 1 in 40 | 6.8 million | 25 per 1000 - NHIS95 (trouble with corns or calluses) |
| 115. Corns | 2.50% | 1 in 40 | 6.8 million | 25 per 1000 - NHIS95 (trouble with corns or calluses) |
| 116. Polycystic ovary syndrome | 2.50% | 1 in 40 | 6.8 million | 5-10% women of childbearing age (20-40); 30% of women have some PCOS symptoms (NWHIC). |
| 117. Fecal incontinence | 2.39% | 1 in 41 | 6.5 million | 6.5 million Americans |
| 118. Angina | 2.35% | 1 in 42 | 6.4 million | 6.4 million Americans (NHLBI) |
| 119. Specific phobias | 2.32% | 1 in 43 | 6.3 million | estimated 6.3 million adult Americans (NIMH); estimated 8.3% adults (USSG) |
| 120. Cystitis | 2.28% | 1 in 43 | 6.2 million | 6.2 million adults self-reported having a bladder infection for more than 3 months in the US 1988-1994 (Weighted Analysis of 1988-1994, NHANES, NIDDK) |
| 121. Infertility | 2.24% | 1 in 44 | 6.1 million | 6.1 million people in 1997 (NWHIC); 5.3 million Americans or 9% of reproductive age (NWHIC/American Society for Reproductive Medicine) |
| 122. Back pain | 2.21% | 1 in 45 | 6 million | 6 million cases annually (unreliable estimate) |
| 123. Nonulcer dyspepsia | 2.13% | 1 in 46 | 5.8 million | 5.8 million people in the USA 1988 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, 1994) |
| 124. Anti-Social Personality Disorder | 2.10% | 1 in 47 | 5.7 million | estimated 2.1% adults (USSG) |
| 125. Cataracts | 2.02% | 1 in 49 | 5.5 million | 5,500,000 people have a cataract interfering with their vision in the US (Research to Prevent Blindness, NISE, NSF) |
| 126. Psoriasis | 2.02% | 1 in 49 | 5.5 million | 5.5 million people in the USA (NIAMS) |
| 127. Autoimmune thyroid diseases | 2.00% | 1 in 50 | 5.4 million | 4 out of 100 women some type of autoimmune thyroid disease |
| 128. Borderline Personality Disorder | 2.00% | 1 in 50 | 5.4 million | 2 percent of adults (NIMH) |
| 129. Cyclic vomiting syndrome | 2.00% | 1 in 50 | 5.4 million | 1 in 50 children (perhaps) |
| 130. Penicillin allergy | 2.00% | 1 in 50 | 5.4 million | 2-3% of people (2-3% of hospitalized patients) |
| 131. Mitral-valve prolapse | 2.00% | 1 in 50 | 5.4 million | 2% of the adult population (NHLBI estimate) |
| 132. Social phobia | 1.95% | 1 in 51 | 5.3 million | 5.3 million adult Americans (NIMH); 3.7% adults (NIMH); 2.0% adults (USSG) |
| 133. Bunions | 1.92% | 1 in 51 | 5.2 million | 19.25 per 1000 - NHIS95 (trouble with bunions) |
| 134. Post-traumatic stress disorder | 1.91% | 1 in 52 | 5.2 million | 5.2 million adult Americans (NIMH); 3.6% adults (NIMH); about 30% of war veterans. |
| 135. Female genital disorders | 1.90% | 1 in 52 | 5.2 million | 38 per 1000 women (NHIS95) |
| 136. Irritable bowel syndrome | 1.84% | 1 in 54 | 5 million | 5 million in the USA 1987 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, US Government Printing Office, 1994); 11 per 1000 (NHIS95) |
| 137. Peptic Ulcer | 1.84% | 1 in 54 | 5 million | 5 million in the USA 1987 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, 1994) |
| 138. Eating disorders | 1.84% | 1 in 54 | 5 million | 5 million women (NWHIC); 1-4% of young women |
| 139. Heart failure | 1.76% | 1 in 56 | 4.8 million | 4.8 million (NHLBI); 2 to 3 million Americans (NHLBI) |
| 140. Congestive Heart Failure | 1.76% | 1 in 56 | 4.8 million | 4.8 million Americans (NHLBI); 2% age 40-59; 5% age 60-69; 10% over 70's |
| 141. Atherosclerosis | 1.70% | 1 in 58 | 4.6 million | 17 per 1000 - NHIS95 |
| 142. Learning disabilities | 1.69% | 1 in 59 | 4.6 million | 4.6 million children (NHIS-97) |
| 143. Stroke | 1.69% | 1 in 59 | 4.6 million | estimated 4.6 million (NHLBI) |
| 144. Abdominal Hernia | 1.65% | 1 in 60 | 4.5 million | 4.5 million people in the USA 1988-90 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 145. Constipation | 1.62% | 1 in 61 | 4.4 million | 4.4 million people in the USA 1983-87 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 146. Edema | 1.60% | 1 in 62 | 4.4 million | 1.6% of population self-reported having oedema in Australia 2001 (ABS 2001 National Health Survey, Australia’s Health 2004, AIHW) |
| 147. Tachycardia | 1.60% | 1 in 62 | 4.4 million | 16 per 1000 (NHIS95) |
| 148. Kidney conditions | 1.50% | 1 in 66 | 4.1 million | 15 per 1000 (NHIS95: "kidney trouble") |
| 149. Alzheimer's Disease | 1.47% | 1 in 68 | 4 million | more than 4 million Americans (CDC); estimated 4 million people in the U.S (NHWIC) |
| 150. Drug abuse | 1.47% | 1 in 68 | 4 million | more than 4 million women need treatment for drug abuse (NWHIC) |
| 151. Generalized anxiety disorder | 1.47% | 1 in 68 | 4 million | 4 million adult Americans (NIMH); 2.8% adults (NIMH); estimated 3.4% adults (USSG) |
| 152. Chronic Hepatitis C | 1.47% | 1 in 68 | 4 million | Almost 4 million Americans have antibodies indicating infection or prior exposure (NIDDK). |
| 153. Deafness | 1.47% | 1 in 68 | 4 million | 4 million people (unreliable estimate) |
| 154. Fibromyalgia | 1.36% | 1 in 73 | 3.7 million | 3.7 million Americans (NIAMS) |
| 155. Color blindness | 1.30% | 1 in 76 | 3.5 million | 13 per 1000 - NHIS95 |
| 156. Anemia | 1.29% | 1 in 77 | 3.5 million | 3.5 million (NHLBI) |
| 157. Attention Deficit Hyperactivity Disorder | 1.21% | 1 in 82 | 3.3 million | 3.3 million children have ADD in USA (NHIS-97); estimated 2 million American children; 3 to 5 percent of all children (NIMH). |
| 158. Obsessive-compulsive disorder | 1.21% | 1 in 82 | 3.3 million | 3.3 million adult Americans (NIMH); 2.3% adults (NIMH); 1 in 50 people (NWHIC); 2.4% adults (USSG) |
| 159. Bipolar disorder | 1.20% | 1 in 83 | 3.3 million | 1.2 percent of the population; 2.3 million adult Americans (NIMH) |
| 160. Agoraphobia | 1.18% | 1 in 84 | 3.2 million | approximately 3.2 million American adults ages 18 to 54 (NIMH); estimated 4.9% adults (USSG) |
| 161. Graves Disease | 1.12% | 1 in 89 | 3 million | 3,048,636 people in the USA 1996 1; 1.3 million people (NWHIC) |
| 162. Von Willebrand disease | 1.10% | 1 in 90 | 3 million | estimated 3 million mostly undiagnosed |
| 163. Open-angle glaucoma | 1.10% | 1 in 90 | 3 million | about 3 million Americans, many not yet diagnosed. |
| 164. Peanut allergies | 1.10% | 1 in 90 | 3 million | 3 million Americans (peanut and tree nut combined; NIAID) |
| 165. Dental conditions | 1.10% | 1 in 90 | 2 million | 1.1 per 100 (NHIS96: acute dental conditions) |
| 166. Stuttering | 1.00% | 1 in 100 | 2.7 million | about 1% of adults |
| 167. Deuteranopia | 1.00% | 1 in 100 | 2.7 million | about 1% of white males |
| 168. Protanopia | 1.00% | 1 in 100 | 2.7 million | about 1% of white males |
| 169. Food allergies | 1.00% | 1 in 100 | 2.7 million | 1% of the adult population have a true immune reaction to food (NHWIC) |
| 170. Latex allergies | 1.00% | 1 in 100 | 2.7 million | 1-6% (NIAID) |
| 171. Speech impairment | 1.00% | 1 in 100 | 2.7 million | 10 per 1000 (NHIS95) |
| 172. Gastritis | 0.99% | 1 in 100 | 2.7 million | 2.7 million people in the USA 1988 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 173. Rheumatoid arthritis | 0.92% | 1 in 108 | 2.5 million | 2.5 million Americans (NWHIC); 1% of US population (NIAMS) |
| 174. Paralysis | 0.90% | 1 in 111 | 2.4 million | 9 per 1000 - NHIS95 (paralysis of extremeties complete/partial) |
| 175. Panic disorder | 0.88% | 1 in 113 | 2.4 million | approximately 2.4 million Americans (NIMH) |
| 176. Vision Impairment | 0.88% | 1 in 113 | 2.4 million | 2.4 million Americans |
| 177. Epilepsy | 0.85% | 1 in 118 | 2.3 million | 2.3 million Americans (CDC) |
| 178. Uveitis | 0.85% | 1 in 118 | 2.3 million | 2,300,000 people suffer uveitis in the US (Research to Prevent Blindness, NISE, NSF) |
| 179. Schizophrenia | 0.81% | 1 in 123 | 2.2 million | Approximately 2.2 million American adults (NIMH); estimated 1.3% adults (USSG); more than 2 million Americans |
| 180. Deviated Septum | 0.80% | 1 in 124 | 2.2 million | 8 per 1000 - NHIS95 |
| 181. Glaucoma | 0.74% | 1 in 136 | 2 million | 2,000,000 people are visually impaired by glaucoma in the US (Research to Prevent Blindness, NISE, NSF) |
| 182. Vitiligo | 0.74% | 1 in 136 | 2 million | 2 to 5 million people in the USA (1-2% worldwide); 1,059,560 people in the USA 1996 1 |
| 183. Diverticular Disease | 0.74% | 1 in 136 | 2 million | 2 million people in the USA 1983-87 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 184. Hepatitis C | 0.74% | 1 in 136 | 2 million | estimated 2 to 5 million HCV chronic carriers |
| 185. Alcoholic liver disease | 0.74% | 1 in 136 | 2 million | More than 2 million Americans (NIAAA) |
| 186. Emphysema | 0.74% | 1 in 136 | 2 million | 2 million Americans (NHLBI); 17 per 1000 - NHIS95; 2 million annually |
| 187. Atrial Fibrillation | 0.74% | 1 in 136 | 2 million | 2 million (NHLBI) |
| 188. Polymyalgia rheumatica | 0.70% | 1 in 142 | 1.9 million | 700 per 100,000 people over 50. |
| 189. Chronic tonsilitis | 0.70% | 1 in 142 | 1.9 million | 7 per 1000 - NHIS95 (chronic disease of tonsils or adenoids) |
| 190. Amputation | 0.70% | 1 in 142 | 1.9 million | 7 per 1000 (NHIS95: excludes toes/fingers only) |
| 191. Binge eating disorder | 0.70% | 1 in 142 | 1.9 million | 0.7% to 4% of the general population (NWHIC); 2-5% of adults (NIMH); 2% of adults (NIDDK); 2% adults or 1-2 million adults (NWHIC) |
| 192. Retina Conditions | 0.66% | 1 in 151 | 1.8 million | 1,800,000 people have severely impaired vision because of retinal disease in the US (Research to Prevent Blindness, NISE, NSF) |
| 193. Hepatitis B | 0.55% | 1 in 181 | 1.5 million | estimated 1.5 million HBV carriers in the U.S. (NWHIC); 417,000 people currently infected (CDC 2001) |
| 194. Bulimia nervosa | 0.55% | 1 in 181 | 1.5 million | estimated 1.1 to 4.2 percent of females (NIMH); 2-3% of young women (NWHIC) |
| 195. Hashimoto's Thyroiditis | 0.55% | 1 in 182 | 1.5 million | 1,490,371 adults and 205,159 children in the USA 1996 1 |
| 196. Lupus | 0.51% | 1 in 194 | 1.4 million | 1.4 million people in the United States, 1 in 85 (NWHIC) |
| 197. Wegener's granulomatosis | 0.50% | 1 in 200 | 1.4 million | uncommon |
| 198. HTLV | 0.50% | 1 in 200 | 1.4 million | uncommon |
| 199. HTLV-1 | 0.50% | 1 in 200 | 1.4 million | uncommon |
| 200. Peyronie's disease | 0.50% | 1 in 200 | 1.4 million | 1 per 100 men |
| 201. Sebaceous cyst | 0.50% | 1 in 200 | 1.4 million | 5 per 1000 - NHIS95 |
| 202. Bladder Incontinence (Pregnancy) | 0.49% | 1 in 203 | 1.3 million | 1-in-3 pregnant women approximately |
| 203. Blindness | 0.40% | 1 in 247 | 1.1 million | 1,100,000 people are legally blind in the US (Research to Prevent Blindness, NISE, NSF) |
| 204. Celiac Disease | 0.40% | 1 in 249 | 1.1 million | 1 in 250 Americans estimated rate; actual diagnosis rate is 1 in 4,700 Americans; 1 in 250 in Italy; 1 in 300 in Ireland; 20,000 diagnosed (Reader's Digest Feb 2004) |
| 205. Sjogren's Syndrome | 0.37% | 1 in 272 | 1 million | 1 to 4 million people with Sjogren’s Syndrome (NIAMS) |
| 206. Connective tissue disorders | 0.37% | 1 in 272 | 1 million | estimated 1 million people in USA with heritable connective tissue disorder (NIAMS) |
| 207. Congenital heart defects | 0.37% | 1 in 272 | 1 million | 1 million (NHLBI) |
| 208. Aphasia | 0.37% | 1 in 272 | 1 million | 1 million Americans (NINDS) |
| 209. Hemochromatosis | 0.37% | 1 in 272 | 1 million | more than 1 million Americans (CDC); 5 per 1000 in Caucasians (NIDDK); 1-in-200 to 1-in-300 |
| 210. Parkinson's Disease | 0.37% | 1 in 272 | 1 million | 1 million people (unreliable estimate) |
| 211. Heritable Disorders of Connective Tissue | 0.37% | 1 in 272 | 1 million | estimated 1 million people in USA with heritable connective tissue disorder (NIAMS) |
| 212. Selective IgA Deficiency | 0.33% | 1 in 300 | 906,666 | 1 in 300 (NIDCD); 1 in 600 (NIAID); 1 in 333 Caucasians. |
| 213. HIV/AIDS | 0.33% | 1 in 302 | 900,000 | 900,000 Americans (NIAID, quarter are unaware) |
| 214. Interstitial cystitis | 0.31% | 1 in 321 | 847,000 | 847,000 in the USA 1988-1994 (Weighted Analysis of 1988-1994 National Health and Nutrition Survey, 2003) |
| 215. Neuralgia | 0.30% | 1 in 333 | 816,000 | 3 per 1000 - NHIS95 (neuralgia or neuritis unspecified) |
| 216. Scoliosis | 0.30% | 1 in 333 | 816,000 | 3-per-1,000 to 5-per-1000 children (NIAMS) |
| 217. Chronic Hepatitis B | 0.28% | 1 in 362 | 750,000 | 750,000 people in the United States (NIAID) |
| 218. Gout | 0.28% | 1 in 363 | 748,000 | 275 per 100,000 people (NIAMS) |
| 219. Von Hippel-Lindau Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 220. Zollinger-Ellison syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 221. Lichen sclerosis | 0.25% | 1 in 400 | 680,000 | rare |
| 222. Immune Thrombocytopenic Purpura | 0.25% | 1 in 400 | 680,000 | rare. |
| 223. Behcet's Disease | 0.25% | 1 in 400 | 680,000 | rare in the USA; more common in Middle East, Asia, and Japan. |
| 224. Penile candidiasis | 0.25% | 1 in 400 | 680,000 | rare |
| 225. Ascariasis | 0.25% | 1 in 400 | 680,000 | rare |
| 226. Zellweger Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 227. Congenital SMA with arthrogryposis | 0.25% | 1 in 400 | 680,000 | rare |
| 228. Agenesis of the corpus callosum | 0.25% | 1 in 400 | 680,000 | rare |
| 229. Aicardi syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 230. Empty Sella Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 231. Hydranencephaly | 0.25% | 1 in 400 | 680,000 | rare |
| 232. Klippel Feil Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 233. Mobius syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 234. Ataxia Telangiectasia | 0.25% | 1 in 400 | 680,000 | rare |
| 235. Chediak-Higashi Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 236. Machado-Joseph Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 237. Kearns-Sayre Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 238. Alpers Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 239. Agnosia | 0.25% | 1 in 400 | 680,000 | rare |
| 240. Alexander Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 241. Alternating Hemiplegia | 0.25% | 1 in 400 | 680,000 | rare |
| 242. Binswanger's Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 243. Brown-Sequard Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 244. Canavan disease | 0.25% | 1 in 400 | 680,000 | rare |
| 245. Coffin-Lowry syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 246. Fabry's Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 247. Fahr's Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 248. Hallervorden-Spatz disease | 0.25% | 1 in 400 | 680,000 | rare |
| 249. Incontinentia Pigmenti | 0.25% | 1 in 400 | 680,000 | rare |
| 250. Joubert Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 251. Krabbé Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 252. Landau-Kleffner Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 253. Microcephaly | 0.25% | 1 in 400 | 680,000 | rare |
| 254. Miller Fisher Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 255. Moyamoya Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 256. Parry Romberg Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 257. Pelizaeus-Merzbacher Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 258. Primary Lateral Sclerosis | 0.25% | 1 in 400 | 680,000 | rare |
| 259. Progressive Supranuclear Palsy | 0.25% | 1 in 400 | 680,000 | rare |
| 260. Rasmussen's Encephalitis | 0.25% | 1 in 400 | 680,000 | rare |
| 261. Sandhoff Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 262. Schilder's Disease | 0.25% | 1 in 400 | 680,000 | rare |
| 263. Septo-Optic Dysplasia | 0.25% | 1 in 400 | 680,000 | rare |
| 264. Soto's Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 265. Stiff-Person Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 266. Subacute Sclerosing Panencephalitis | 0.25% | 1 in 400 | 680,000 | rare - because of the rarity of measles due to vaccination programs. |
| 267. Williams Syndrome | 0.25% | 1 in 400 | 680,000 | rare |
| 268. Ménétrier's disease | 0.25% | 1 in 400 | 680,000 | rare |
| 269. Goodpasture syndrome | 0.25% | 1 in 400 | 680,000 | rare. |
| 270. Encephaloceles | 0.25% | 1 in 400 | 680,000 | rare |
| 271. Ramsay Hunt Syndrome Type 2 | 0.25% | 1 in 400 | 680,000 | rare |
| 272. Mastocytosis | 0.25% | 1 in 400 | 680,000 | rare |
| 273. Cutaneous mastocytosis | 0.25% | 1 in 400 | 680,000 | rare |
| 274. Restrictive cardiomyopathy | 0.25% | 1 in 400 | 680,000 | rare |
| 275. Bacterial vaginosis | 0.24% | 1 in 424 | 640,000 | 16% of pregnant women (DSTD) |
| 276. Polycystic kidney disease | 0.22% | 1 in 453 | 600,000 | 600,000 Americans |
| 277. Inflammatory bowel disease | 0.20% | 1 in 500 | 544,000 | 1 in 500 (NIAID); 300,000 people to 500,000 people NIDDK |
| 278. Autism | 0.20% | 1 in 500 | 544,000 | 1 in 500 to 1 in 2,500 (NIMH); 1-in-1000 to 2-in-1000, depending on diagnostic criteria |
| 279. Nonaffective Psychosis | 0.20% | 1 in 500 | 544,000 | estimated 0.2% adults (USSG) |
| 280. Somatization Disorder | 0.20% | 1 in 500 | 544,000 | estimated 0.2% adults (USSG) |
| 281. Traumatic Brain Injury | 0.20% | 1 in 500 | 544,000 | 0.2% of population has an acquired brain injury in Australia 1998 (Australia’s Health 2004, AIHW) |
| 282. Temporal arteritis | 0.20% | 1 in 500 | 544,000 | 200 per 100,000 people over 50. |
| 283. Hypertrophic cardiomyopathy | 0.20% | 1 in 500 | 544,000 | 0.2 percent of the U.S. population |
| 284. Autosomal dominant polycystic kidney disease | 0.20% | 1 in 503 | 540,000 | 540,000 Americans approximately (90% of PKD) |
| 285. Crohn's disease | 0.18% | 1 in 544 | 500,000 | 500,000 Americans |
| 286. Chronic Fatigue Syndrome | 0.18% | 1 in 544 | 500,000 | 500,000 Americans (CDC/NIAID) |
| 287. Liver conditions | 0.15% | 1 in 679 | 400,000 | 400,000 people in the USA 1976-80 for "chronic liver disease and cirrhosis" (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 288. Postpartum depression | 0.15% | 1 in 679 | 400,000 | 10% of pregnancies. |
| 289. Chronic liver disease | 0.15% | 1 in 679 | 400,000 | 400,000 people |
| 290. Cirrhosis of the liver | 0.15% | 1 in 679 | 400,000 | 400,000 people in the USA 1976-80 for "chronic liver disease and cirrhosis" (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994) |
| 291. Ocular Herpes | 0.15% | 1 in 679 | 400,000 | 400,000 Americans have had some form |
| 292. Pernicious anemia | 0.15% | 1 in 680 | 399,454 | 399,455 people in the USA 1996 1 |
| 293. End-stage renal disease | 0.14% | 1 in 693 | 392,022 | 392,023 people in the USA 2001 (United States Renal Data System 2003 Annual Data Report, 2003) |
| 294. Multiple Sclerosis | 0.14% | 1 in 700 | 388,571 | 1-in-700 (NIAID) |
| 295. Triple-X syndrome | 0.14% | 1 in 700 | 388,571 | 1-in-700 approximately. |
| 296. Ankylosing Spondylitis | 0.13% | 1 in 775 | 350,879 | 129 of every 100,000 people in the US (Mayo Clinic) |
| 297. Type 1 diabetes | 0.12% | 1 in 800 | 340,000 | 1-in-800 (NIAID) |
| 298. Scleroderma | 0.11% | 1 in 906 | 300,000 | estimated 300,000 Americans (NWHIC) |
| 299. Kidney Dialysis | 0.11% | 1 in 946 | 287,493 | 287,494 people in the USA 2001 (United States Renal Data System 2003 Annual Data Report, 2003) |
| 300. Anorexia Nervosa | 0.10% | 1 in 1,000 | 272,000 | estimated 0.1% adults (USSG); estimated 0.5 to 3.7 percent females (NIMH); 1% of adolescent girls (NWHIC) |
| 301. Narcolepsy | 0.07% | 1 in 1,359 | 200,000 | 200,000 Americans (NHLBI estimate); 50,000 diagnosed. |
| 302. Ménière's disease | 0.05% | 1 in 1,973 | 137,847 | about 10,000 people in Australia |
| 303. Autoimmune Lymphoproliferative Syndrome | 0.05% | 1 in 2,000 | 136,000 | very rare; NIAID mentions 58 individuals |
| 304. Neonatal lupus | 0.05% | 1 in 2,000 | 136,000 | very rare |
| 305. Jacobs syndrome | 0.05% | 1 in 2,000 | 136,000 | 1-in-2000 approximately. |
| 306. Androgen Insensitivity Syndrome | 0.05% | 1 in 2,000 | 136,000 | very rare |
| 307. Porencephaly | 0.05% | 1 in 2,000 | 136,000 | extremely rare |
| 308. Schizencephaly | 0.05% | 1 in 2,000 | 136,000 | extremely rare |
| 309. Keratoconus | 0.05% | 1 in 2,000 | 136,000 | 1-in-2000 Americans |
| 310. Retinitis Pigmentosa | 0.04% | 1 in 2,719 | 100,000 | 100,000 people have retinitis pigmentosa which can cause retinal deterioration and blindness in the US (Research to Prevent Blindness, NISE, NSF) |
| 311. Vagina cancer | 0.03% | 1 in 3,333 | 81,600 | 3 in 10,000 for DES-related cases of vaginal cancer. |
| 312. Diethylstilbestrol | 0.03% | 1 in 3,333 | 81,600 | 3 per 10,000 with a risk of vaginal cancer; probably higher if include other complications of DES |
| 313. Sickle Cell Anemia | 0.03% | 1 in 3,777 | 72,000 | 72,000 people in USA (NHLBI); 2 million carriers (USA); 1 in 12 African American carriers |
| 314. Familial emphysema | 0.03% | 1 in 3,885 | 70,000 | 70,000 Americans |
| 315. Multiple Myeloma | 0.02% | 1 in 4,317 | 63,000 | about 63,000 people affected by multiple myeloma ("Orphan Products: Hope for People With Rare Diseases", By Carol Rados, FDA Consumer magazine, November-December 2003 Issue) |
| 316. Primary Glomerulonephritis | 0.02% | 1 in 4,428 | 61,422 | 61,423 people with Primary Glomerulonephritis in the USA 1996 1 |
| 317. IgA nephropathy | 0.02% | 1 in 4,428 | 61,422 | 61,423 people in the USA 1996 1 |
| 318. Turner Syndrome | 0.02% | 1 in 5,000 | 54,400 | 1-in-5000 |
| 319. Sarcoidosis | 0.02% | 1 in 5,000 | 54,400 | 20 per 100,000 overall; 5 in 100,000 white people; 40 out of 100,000 black people; Scandinavia 64 out of 100,000 people |
| 320. Marfan syndrome | 0.02% | 1 in 5,000 | 54,400 | 1 in 5,000 people in the USA |
| 321. Ehlers-Danlos syndrome | 0.02% | 1 in 5,000 | 54,400 | 1 in 5,000 to 10,000 (Ehler's Danlos National Foundation) |
| 322. Cardiomyopathy | 0.02% | 1 in 5,439 | 50,000 | 50,000 Americans (NHLBI) |
| 323. Neonatal Respiratory Distress Syndrome | 0.01% | 1 in 6,800 | 40,000 | 40,000 infants and 150,000 adults with adult RDS (NHLBI) |
| 324. Amyotrophic lateral sclerosis | 0.01% | 1 in 9,066 | 30,000 | 30,000 cases of ALS in America (Robert Packard Research Center at John Hopkins Hospital) |
| 325. Cystic Fibrosis | 0.01% | 1 in 9,066 | 30,000 | 30,000 Americans (NIDDK) |
| 326. Tuberous sclerosis | 0.01% | 1 in 10,000 | 27,200 | less than 1 in 10,000 |
| 327. Uterine Cancer | 0.01% | 1 in 13,333 | 20,400 | 4,500 women in the UK 2001 (National Statistics, UK Government Census, 2001) |
| 328. Hemophilia | 0.01% | 1 in 13,600 | 20,000 | 20,000 people in the United States (NHLBI) |
| 329. Usher Syndrome | 0.01% | 1 in 17,000 | 16,000 | 16,000 Americans |
| 330. Myasthenia Gravis | 0.00% | 1 in 20,000 | 13,600 | about 5 per 100,000 to 14 per 100,000 (NWHIC) |
| 331. Dermatomyositis | 0.00% | 1 in 20,205 | 13,461 | 13,462 people with polymyositis/dermatomyositis in the USA 1996 1 |
| 332. Acromegaly | 0.00% | 1 in 25,000 | 10,880 | 40-60 per million affected people at any time |
| 333. Primary biliary cirrhosis | 0.00% | 1 in 29,462 | 9,231 | 9,232 people in the USA 1996 1 |
| 334. Multiple endocrine neoplasia type 1 | 0.00% | 1 in 33,333 | 8,160 | 3 per 100,000 up to 20 per 100,000 (NIDDK) |
| 335. Autoimmune uveitis | 0.00% | 1 in 58,658 | 4,637 | 4,637 people in the USA 1996 1 |
| 336. Corneal Dystrophies | 0.00% | 1 in 64,761 | 4,200 | 4,200 people have reduced vision because of corneal dystrophies in the US (Research to Prevent Blindness, NISE, NSF) |
| 337. Amyloidosis | 0.00% | 1 in 90,666 | 3,000 | less than 3,000 people in the US (Mayo Clinic) |
| 338. Addison's Disease | 0.00% | 1 in 100,000 | 2,720 | 1 in 100,000; 13,335 people in the USA 1996 1 |
| 339. Guillain-Barre Syndrome | 0.00% | 1 in 100,000 | 2,720 | about 1 in 100,000 (NWHIC) |
| 340. X-Linked Agammaglobulinemia | 0.00% | 1 in 100,000 | 2,720 | 1-in-100,000 |
| 341. Autoimmune Hepatitis | 0.00% | 1 in 235,294 | 1,156 | 1,156 people in the USA 1996 1 |
| 342. Thalassemia | 0.00% | 1 in 272,000 | 1,000 | 1,000 people with Cooley's anemia (NHLBI) |
| 343. Cryptococcosis | 0.00% | 1 in 500,000 | 544 | 0.2-0.9 cases per 100,000 in the general population (DBMD) |
| 344. SCID | 0.00% | 1 in 500,000 | 543 | approximately 1-per-500,000 (NIDCD); 1-per-million |
| 345. Cushing's syndrome | 0.00% | 1 in 500,000 | 543 | 2-5 per million (NIDCD); 10 per million; 10-15 per million |
| 346. Lymphangioleiomyomatosis | 0.00% | 1 in 544,000 | 500 | Several hundred people in the USA (NHLBI) |
| 347. Mucopolysaccharidosis I | 0.00% | 1 in 1.4 million | 200 | about 200 people ("Orphan Products: Hope for People With Rare Diseases", By Carol Rados, FDA Consumer magazine, November-December 2003 Issue) |
| 348. Glucagonoma | 0.00% | 1 in 2.7 million | 100 | only 100 cases since 1974 (Ganda, 1997) |
| 349. POEMS | 0.00% | 1 in 2.7 million | 100 | about 100 known cases (Ganda [1997]) |
| 350. Chronic Granulomatous Disease | 0.00% | 1 in 4 million | 67 | 1-in-4 million to 5 million (NIAID) |
| 351. Rheumatic conditions | 0.00% | 1 in 6.3 million | 43 | nearly 43 Americans have arthritis or a rheumatic disease (CDC); 40 million people in the United States (NIAMS) |
| 352. Somatostatinoma | 0.00% | 1 in 13.6 million | 20 | 20 known cases in the literature (Ganda, 1997) |
| 353. Pseudotumor Cerebri | 0.00% | 1 in 272 million | 1 | about 1-2 people per 100,000 population have benign intracranial hypertension in the US (Association for Spina Bifida and Hydrocephalus) |
Footnotes:
1. Rose and Mackay, 1998, The Autoimmune Diseases, Third Edition
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