Finally, Huang et al. [12] investigated the risk of OCD among 89,500 FDRs of OCD patients in Taiwan from 2001 until 2010. Compared to the general population, the FDRs of OCD patients had a higher risk of OCD (RR = 8.11, 95% CI = 7.68–8.57). More specifically, the relative risks were: RR = 7.64, 95% CI = 7.10–8.23 for parents; RR = 7.18, 95% CI = 6.65–7.75 for the offspring; RR = 8.95, 95% CI = 8.44–9.49 for siblings; and RR = 60.76, 95% CI = 49.12–75.16 for twins.
