Table 1.

Descriptive Data for Probands and Response Rates to the Questionnaire*

PDDAutoimmuneHealthy
Mean age (y ± SD)10.2 ± 4.210.3 ± 4.86.5 ± 4.0
Sex: male/female83/1831/7060/41
Race
 White969492
 Black254
 Other325
Response rates101/196 (52%)101/135 (75%)101/182 (55%)
  • * Each group consists of 101 families.

  • Compared with healthy: t = 7.13, P < .0001.

  • Response rate indicates the proportion of questionnaires completed of the number distributed to each group.