Features | BPDa | 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 featuresc (%) | 6(30.0) | 8(16.0) | 14(20.0) | 6(11.5) | 0.060 | 0.513 | 0.212 |
Manic symptomsd(%) | 6(30.0) | 16(32.0) | 22(31.4) | 4(7.7) | 0.014 | 0.002 | 0.002 |
Comorbidity of anxiety disordere (%) | 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 |