Table 3.

Multivariate logistic regression analysis between suicidal ideation, grade, family structure and health-risk behaviors by gender among Chinese students (AOR, 95% CI)

variables	Boys*	PRSE	Girls*	PRSE	Interaction term p-value
Grade (junior vs senior)	–		1.24 (1.11, 1.38)†	26.0	0.002
Family structure:
Both parents	1.00		1.00
Others	1.31 (1.14, 1.50)‡	26.0	1.17 (1.03, 1.34)†	42.2	0.271
Academic pressure:
Low	1.00		1.00
Average	0.95 (0.79, 1.12)	156.1	1.19 (0.97, 1.47)	60.5	0.051
High	1.55 (1.30, 1.85)‡	20.8	2.42 (1.95, 3.00)‡	12.4	<0.001
Academic achievement:
Above average	1.00		–
Average	0.88 (0.75, 1.02)	59.5	–		0.253
Below average	1.04 (0.90, 1.19)	194.6	–		0.459
Not sure	1.39 (1.10, 1.75)†	36.4	–		0.071
Smoking	–		1.52 (1.33, 1.72)‡	15.9	<0.001
Binge drinking (yes)	1.17 (1.01, 1.34)†	46.8	1.30 (1.09, 1.54)†	33.6	<0.001
Fighting:
Never	1.00		1.00
Once	1.06 (0.90, 1.25)	150.9	1.63 (1.35, 1.97)‡	19.8	<0.001
Twice or more	1.42 (1.23, 1.62)‡	20.2	1.57 (1.28, 1.92)‡	23.4	0.046
≥2 PE classes per week	0.75 (0.61, 0.92)†	36.5	–		<0.001
Exercising over 60 min >2 days per week	–		–		–
Considering running away from home	3.70 (3.27, 4.19)‡	4.8	3.15 (2.82, 3.52)‡	4.9	0.770
Running away from home	1.87 (1.59, 2.20)‡	13.4	1.72 (1.42, 2.07)‡	17.8	0.735
Victim of bullying	1.49 (1.31, 1.71)‡	17.0	1.54 (1.31, 1.82)‡	19.1	0.226
Feeling lonely:
Never	1.00		1.00
Sometimes or seldom	1.49 (1.27, 1.75)‡	20.3	1.53 (1.30, 1.80)‡	19.5	0.199
Often or always	3.00 (2.50, 3.59)‡	8.5	3.40 (2.83, 4.10)‡	7.8	0.008
Being sad/hopeless	2.04 (1.79, 2.33)‡	9.4	2.39 (2.10, 2.72)‡	7.5	0.018

PRSE – percent relative standard error, AOR – adjusted odds ratio, CI – confidence interval, PE – physical exercise

*Adjusted for school type in all models. – designates not entered into the model.

†P < 0.05.

‡P < 0.001.