Table 3. Factors associated with sexual partnership in the past 12 months among university students from nine ASEAN countries (n = 8,836).

Variables	No sexual partner vs. one sexual partner		<2 vs. ≥2 sexual partners
	CRRR (95% CI)	ARRR (95% CI)	CRRR (95% CI)	ARRR (95% CI)
Age groups
18–19 (32.2%)	Reference	Reference	Reference	Reference
20–21 (49.7%)	2.75 (1.39, 5.47)**	2.33 (1.15, 4.74)*	2.84 (1.68, 4.78)**	2.49 (1.04, 5.97)*
22–30 (28.1%)	3.93 (1.44, 10.71)*	3.55 (1.64, 7.68)**	4.08 (1.58, 10.55)**	2.80 (1.23, 6.38)*
Gender
Female (62.0%)	Reference	Reference	Reference	Reference
Male (38.0%)	1.54 (1.17, 2.04)**	1.17 (0.83, 1.64)	4.04 (1.72, 9.48)**	3.71 (1.39, 9.92)*
Family economic background
Quite well off/wealthy (36.9%)	Reference	Reference	Reference	–
Quite poor/not very well off (63.1%)	0.83 (0.40, 1.73)	–	1.38 (0.87, 2.20)	–
Living situationa
With parents (34.1%)	Reference	–	Reference	–
Away from parents (65.9%)	1.26 (0.47, 3.38)	–	1.38 (0.87, 2.20)	–
Country income category
Upper middle income/High income (38.8%)	Reference	–	Reference	–
Lower middle income (61.2%)	0.54 (0.12, 2.40)	–	0.41 (0.14, 1.18)	–
Severe depressive symptoms (9.3%)	0.96 (0.45, 2.02)	1.13 (0.52, 2.45)	2.34 (1.23, 4.43)*	2.36 (1.33, 6.34)*
Current tobacco use (4.1%)	3.23 (1.86, 5.61)***	2.04 (0.84, 4.99)	10.80 (6.60, 17.67)***	4.57 (3.05, 6.85)***
Binge drinking (past year) (18.2%)	4.52 (2.48, 8.23)***	3.53 (1.79, 6.95)***	6.07 (3.58, 10.27)***	4.33 (2.76, 6.78)***
Illicit drug use on past year (17.4%)	1.80 (1.01, 3.23)*	1.46 (1.16, 1.84)**	1.52 (0.70, 3.28)	1.05 (0.65, 1.63)
Having been in physical fight in the past 12 months (6.9%)a	1.17 (0.54, 2.50)	1.01 (0.67, 1.60)	3.88 (1.87, 8.02)**	2.36 (1.37, 4.05)**

RRR = Relative Risk Ratio.

***P < .001; **P < .01; *P < .05.

^aNot assessed in Cambodia.