Validation of the Chinese version of the

Table 1 The demographic and clinical features of the sample population

Features	BPD^a			UPD	P ^b
	BPDI	BPDII	Total		BPDI	BPDII	BPD
	N = 20	N = 50	N = 70	N = 52
Age(Mean ± SD) (year)	28.0 ± 8.7	29.2 ± 8.6	28.8 ± 8.6	33.6 ± 10.5	0.023	0.009	0.007
Onset age (Mean ± SD) (year)	25.4 ± 8.2	25.7 ± 9.3	25.6 ± 8.9	31.2 ± 10.9	0.034	0.009	0.003
Duration of illness (month)	42.1 ± 34.4	51.8 ± 61.3	48.9 ± 54.6	30.8 ± 33.0	0.202	0.034	0.037
Female (%)	5(25.0)	27(54.0)	32(45.7)	29(55.8)	0.019	0.858	0.272
Atypical features^c (%)	6(30.0)	8(16.0)	14(20.0)	6(11.5)	0.060	0.513	0.212
Manic symptoms^d(%)	6(30.0)	16(32.0)	22(31.4)	4(7.7)	0.014	0.002	0.002
Comorbidity of anxiety disorder^e (%)	7(35.0)	14(28.0)	21(30.0)	16(30.8)	0.730	0.759	0.927
Comorbidity of psychoactive drug abuse (%)	1(5.0)	1(2.0)	2(2.9)	3(5.8)	0.898	0.327	0.422
Recurrent depression (%)	15(75.0)	27(54.0)	42(60.0)	23(44.2)	0.019	0.324	0.084
Number of depressive episode(χ ± s)	3.6 ± 4.2	3.3 ± 4.4	3.4 ± 4.3	1.8 ± 1.0	0.006	0.015	0.009

a. The categorization was based on the final diagnosis
b. all compared with UPD
c. Atypical features including mood reactivity, overeating or weight gain, oversleeping, leaden paralysis and interpersonal rejection sensitivity
d. Manic symptoms, including speech pressure, racing thought, overconfidence, hostility, irritability, sexual interest and garish make-up were found by psychiatric interview based on the Young Mania Rating Scale at the entry of this study
e. Anxiety disorder here consisted of generalized anxiety disorder, panic disorder, obsessive-compulsive disorder, phobia, somatization disorder

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