Table 1.

Prevalence Estimates of PD in 6 community studies in the 1990s in US and China

Country	Location	Rates (%)	Year, Author(s)	Criteria Used	Methods
U.S.	Lowa	17.9%	(Zimmerman and Coryell 1989)	DSM-III	SIDP, Structured Interview for DSM PD
U.S.	Lowa	11.1%	(Reich et al. 1989)	DSM-III	PDQ, Personality Diagnostic Questionnaire
U.S.	New York	7.3%	(Moldin et al. 1994)	DSM-III-R	PDE, PD Examination for DSM-III-R
U.S.	New York	14.8%	(Klein et al. 1995)	DSM-III-R	PDE, PD Examination for DSM-III-R
China	12 provinces	0.13‰	(Chen et al. 1986)	CCMD-2	Unstructured clinical evaluation
China	7 provinces	0.1‰	(Zhang et al. 1998)	CCMD-2-R	Unstructured clinical evaluation