Table 3.

Number of Families That Have at Least One Specified Member With an Autoimmune Disorder*

PDDAutoimmuneHealthy
Parent312812
Mother261710
Father5132
Sibling862
Brother520
Sister342
Grandparent554835
Grandmother473528
Grandfather232214
Uncle17116
Aunt252517
Cousin12108
  • * Each group consists of 101 families.

  • Compared with healthy: χ2 = 10.97; P = .0009.