TABLE 1

Characteristics of Patients in the AC and CHB Cohorts

ACCHBCombined
Patients, n461472933
Age range, y/mo (at visit)1/7 to 21/101/3 to 22/0
Gender, n
    Male369386755
    Female9286178
Diagnosis, n
    Autistic disorder211236447
    PDD-NOS227227454
    Asperger disorder22931
    CDD101
Secondary diagnosis, n
    MR54NANA
    Seizures36NANA
    Multiple congenital anomalies16NANA
  • CHB indicates Children's Hospital Boston; NA, not available; CDD, childhood disintegrative disorder.