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. 2012 Jan 4;37(5):1216–1223. doi: 10.1038/npp.2011.308

Table 1. Demographics of OCD Subjects and Healthy Controls.

Demographic variables Healthy controls OCD subjects
N 22 22
Age (SD) 31 (8.9) 31 (9.1)
Cigarette smokers 1 1
     
Sex
 Male 12 12
 Female 10 10
     
Ethnicity
 Asian 3 3
 Hispanic 3 3
 Caucasian 16 16

In all, 22 OCD subjects were individually matched with healthy controls on variables of age, sex, ethnicity, and smoking status.