Table 3.

Correlation between self-rated mental health and rate of positive K10 scores.

Self-rated mental health	n	n (K10 > 21)	Positive rate (%)a	K10b
Poor	30	30	100.00	34.40 ± 5.71
Not good	231	197	85.28	28.16 ± 5.46
Good	250	94	37.60	20.20 ± 6.37
Very good	92	5	5.43	13.10 ± 3.87
Total	603	326	54.06	22.87 ± 8.18

^a Trend chi-square of positive rate comparison χ² = 222.19，P < 0.001.

^b Comparison of K10 score between groups F = 217.92，P < 0.001.