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. 2015 Jan 27;17(1):e29. doi: 10.2196/jmir.4082

Table 1.

Disease incidenceain the United States and in the self-identified user (SIU) population for 29 diseases.

Disease Percentage of SIUs Incidence in the United States Rank of SIU Rank of incidence in the United States
HIV 6.17E+00 1.53E-04 1 18
Cancer 5.19E+00 5.37E-03 2 3
Diabetes mellitus 4.42E+00 6.13E-03 3 2
Herpes simplex 2.34E+00 2.50E-03 4 4
Arthritis 1.30E+00 4.10E-04 5 11
Atrial fibrillation 1.08E+00 6.45E-02 6 1
Gastroparesis 1.05E+00 2.50E-05 7 28
Heart failure 9.70E-01 1.77E-04 8 15
Schizophrenia 9.44E-01 7.00E-04 9 8
Crohn’s disease 8.38E-01 7.90E-05 10 20
Dementia 7.69E-01 1.51E-03 11 5
Alzheimer's disease 7.53E-01 1.26E-03 12 6
Amyotrophic lateral sclerosis 6.04E-01 1.81E-05 13 29
Parkinson's disease 5.62E-01 1.77E-04 14 15
Breast cancer 5.04E-01 7.51E-04 15 7
Colitis 4.40E-01 8.80E-05 16 19
Asthma 4.19E-01 7.00E-04 17 8
Epilepsy 3.92E-01 4.70E-04 18 10
Lyme disease 3.45E-01 7.00E-05 19 23
Hepatitis C 3.08E-01 5.48E-05 20 25
Spina bifida 2.65E-01 3.49E-04 21 12
Leukemia 2.55E-01 1.69E-04 22 17
Hypothyroidism 2.33E-01 2.86E-04 23 13
Chronic pancreatitis 2.28E-01 4.35E-05 24 27
Celiac disease 2.17E-01 6.50E-05 25 24
Cardiomyopathy 1.96E-01 5.00E-05 26 26
Multiple myeloma 1.59E-01 7.76E-05 27 21
Lymphoma 1.48E-01 2.58E-04 28 14
Brain tumor 1.22E-01 7.54E-05 29 22

aIncidence is provided as a fraction of the population.