. Author manuscript; available in PMC: 2014 Jan 27.

Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2012 Oct 22;0(8):987–996. doi: 10.1002/ajmg.b.32107

Table IV.

Comparison of web-based and clinic-based study participant characteristics

Variable	Web-based Participants (n=631)	Clinic-based participants (n=238)	P-value
Female	30.4% (n=192)	19.3% (n=46)	.001^*
Male	69.6% (n=439)	80.7% (n=192)
Non-white	10.8% (n=68)	7.2% (n=17)	.328
White	89.2% (n=563)	92.8% (n=219)
Hispanic	5.7% (n=36)	12.4% (n=9)	.325
Non-Hispanic	94.3% (n=592)	96.2% (n=229)
ADHD diagnosis	44.7% (n=282)	48.1% (n=114)	.069^a
No ADHD diagnosis	55.3% (n=349)^a	51.9% (n=123)
OCD diagnosis	50.6% (n=319)	47.7% (n=113)	.497^a
No OCD diagnosis	49.4% (n=312)^a	52.3% (124)
History of TS or another tic disorder in 1^st degree relative	27.7% (n=175)	34.6% (n=82)	.059^a
No History of TS or another tic disorder in 1^st degree relative	72.3% (n=456)	65.4% (n=155)
Mean Age	25.77 (17.03)	20.11 (13.85)	<.001^*

Significant at the p=<.01 level

”Don’t know” responses included with “no” responses due to small cell sizes