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Table 1 Baseline characteristics of patients newly initiated on interferon therapy between 2001 and 2012

From: Pulmonary arterial hypertension associated with interferon therapy: a population-based study

Patient characteristics Number Percent
Indication for interferon
 Multiple sclerosis 7190 35.75
 Hepatitis C 12,923 64.25
Age
 20–29 1205 5.99
 30–39 3154 15.68
 40–49 7526 37.42
 50–59 7084 35.22
 60–65 1144 5.69
Gender
 Male 9906 49.25
 Female 10,207 50.75
Comorbiditya
 Hypertension 3612 17.96
 Other liver diseaseb 2647 13.16
 Diabetes 1589 7.90
 Chronic pulmonary disease 750 3.73
 Sleep apnea 338 1.68
 Connective tissue disorder 331 1.65
 Obesity 294 1.46
 HIV/AIDS 268 1.33
 Valvular heart disease 156 0.78
 Congestive heart failure 86 0.43
 Atrial fibrillation and flutter 74 0.37
 Congenital heart disease 8 0.04
  Mean ± STD (Median)
Age 46.36 ± 9.24 (48.00)
Follow-up time, months 29.49 ± 27.41 (20.00)
  1. aA patient could have more than one comorbidity. bExcluding hepatitis C