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Table 1 Basic characteristics of the study population

From: Co-occurring hydrocephalus in autism spectrum disorder: a Danish population-based cohort study

  N Median age in years, Dec 2016b (interquartile range) Male (%) Median age at diagnosis in years (interquartile range)
No psychiatric disease (controls) 28,606 22.6 (16.9–28.6) 50.4 Not relevant
Schizophrenia 5242 28.6 (25.3–32.2) 53.3 21.2 (18.9–24.0)
Major depressive disorder 22,868 28.8 (25.0–32.2) 31.9 20.0 (17.0–23.3)
Bipolar disorder 2300 29.7 (26.5–32.8) 35.6 22.9 (20.0–26.5)
Autism spectrum disorder 14,564 19.8 (16.2–23.9) 80.9 9.6 (6.4–13.3)
 Childhood autism 4447 17.9 (14.6–21.6) 81.4 7.3 (4.8–12)
 Atypical autism 1803 19.7 (16.2–23.6) 75.8 10.8 (7.1–14.4)
 Asperger’s syndrome 4405 21.7 (17.7–25.9) 83.6 11.5 (8.6–14.9)
 Other PDDa 1868 20.7 (16.9–24.5) 80.9 10.5 (7.6–13.5)
 Unspecified PDD 2131 19.7 (15.9–24.5) 78.5 9.5 (6.6–13.2)
Attention-deficit hyperactivity disorder 12,901 21.2 (16.8–25.7) 75.2 11.4 (8.4–17.0)
  1. aPervasive developmental disorder.
  2. bEnd of follow-up