. Author manuscript; available in PMC: 2014 Aug 26.

Published in final edited form as: Soc Psychiatry Psychiatr Epidemiol. 2011 Dec 8;47(9):1409–1417. doi: 10.1007/s00127-011-0445-x

Table 5.

Proportion of Patients with Comorbid PDs

Groups (N=3075)	N	%	95% CI
0 PD.	2093	68.1%	66.4%–69.7%
1 PD.	546	17.8%	16.4%–19.1%
2 PDs.	280	9.1%	8.1%–10.1%
≥3 PDs.	156	5.1%	4.3%–5.8%

Note: 0 PD (without any diagnosis of PD); 1 PD (only one PD); 2 PDs (two combined PDs); ≥3 PDs (at least three combined PDs).