From: Screening cluster A and cluster B personality disorders in Chinese high school students
 | Total n = 3552 | Gender | Grades | ||||||
---|---|---|---|---|---|---|---|---|---|
 |  | Male n = 1790 | Female n = 1762 | t | Cohen’s d | Freshman n = 1413 | Sophomore n = 1254 | Junior n = 885 | F |
PPD | 2.70 ± 1.92 | 2.81 ± 1.93 | 2.58 ± 1.90 | 3.679* | 0.120 | 2.75 ± 1.92 | 2.69 ± 1.93 | 2.61 ± 1.89 | 1.320 |
SPD | 2.12 ± 1.67 | 2.16 ± 1.80 | 2.08 ± 1.51 | 1.551 | 0.048 | 2.21 ± 1.70a | 2.17 ± 1.70b | 1.91 ± 1.53 | 9.025* |
STPD | 3.24 ± 2.31 | 3.52 ± 2.37 | 2.96 ± 2.21 | 7.341* | 0.244 | 3.32 ± 2.33 | 3.26 ± 2.30 | 3.09 ± 2.28 | 2.692 |
BPD | 3.11 ± 2.34 | 3.11 ± 2.38 | 3.10 ± 2.30 | .086 | 0.004 | 3.25 ± 2.41a | 3.14 ± 2.32b | 2.83 ± 2.25 | 8.935* |
APD | 2.13 ± 1.834 | 2.38 ± 1.98 | 1.86 ± 1.63 | 8.604* | 0.287 | 2.21 ± 1.89a | 2.25 ± 1.88b | 1.82 ± 1.62 | 15.231* |
HPD | 3.52 ± 1.92 | 3.55 ± 2.01 | 3.49 ± 1.82 | .826 | 0.031 | 3.54 ± 1.95 | 3.52 ± 1.92 | 3.49 ± 1.87 | 0.199 |
NPD | 3.67 ± 2.23 | 3.76 ± 2.31 | 3.57 ± 2.14 | 2.650* | 0.085 | 3.75 ± 2.27 | 3.61 ± 2.24 | 3.61 ± 2.14 | 1.826 |