Table 4.

Multivariable ordinal logistic regression of association between sex of first sexual partner and high-risk behaviors among Chinese men who have sex with men (N = 3588)

Partner’s gender at sexual debut	Age of sexual debut						p for trend
	≤18 years, age		19–22 years, age		≥23 year, age
	AOR† (95% CI)	p- value	AOR† (95% CI)	p- value	AOR† (95% CI)	p-value
Total number of lifetime male sexual partnersa
With a woman	Reference		Reference		Reference
With a man	2.38 (1.74, 3.25)	<0.001	2.28 (1.83, 2.85)	<0.001	1.85 (1.39, 2.45)	<0.001	<0.001
Total number of receptive anal sex with men in the past 3 monthsb
With a woman	Reference		Reference		Reference
With a man	1.82 (1.36, 2.43)	<0.001	1.54 (1.23, 1.94)	<0.001	1.64 (1.18, 2.28)	0.003	<0.001
Total number of condomless receptive anal sex with men in the past 3 monthsc
With a woman	Reference		Reference		Reference
With a man	1.68 (1.05, 2.69)	0.03	1.28 (0.94, 1.73)	0.112	1.04 (0.73, 1.49)	0.817	<0.001
Total number of insertive anal sex with men in the past 3 monthsd
With a man	Reference		Reference		Reference
With a woman	1.99 (1.52, 2.61)	<0.001	1.46 (1.19, 1.82)	<0.001	1.22 (0.91, 1.65)	0.186	<0.001
Total number of condomless insertive anal sex with men in the past 3 monthse
With a man	Reference		Reference		Reference
With a woman	2.32 (1.67, 3.23)	<0.001	1.41 (1.07, 1.86)	0.015	1.05 (0.71, 1.55)	0.801	0.031
Total number of lifetime female sexual partnersf
With a man	Reference		Reference		Reference
With a woman	66.35 (43.08, 102.22)	<0.001	31.31 (23.29,42.09)	<0.001	30.06 (19.66,45.97)	<0.001	0.042
Total number of vaginal sex with women in the past 3 monthsg
With a man	Reference		Reference		Reference
With a woman	5.90 (3.61,9.64)	<0.001	3.71 (2.43, 5.66)	<0.001	3.84 (2.11, 6.99)	<0.001	0.211
Total number of condomless vaginal sex with women in the past 3 monthsh
With a man	Reference		Reference		Reference
With a woman	3.68 (1.58, 8.58)	0.002	2.44 (1.48, 4.03)	<0.001	2.94 (1.65, 5.24)	<0.001	0.747

Odds ratios represent the odds of attaining a higher category of the specific high-risk behavior outcome; p for trend denotes the trend of attaining higher frequency category of the specific high-risk behaviors across increased order of age groups

^aCategory (number of lifetime male sexual partners): 1–4, 5–9, 10–19, ≥20

^bCategory (Total number of receptive anal sex with men in the past 3 months): 0, 1, 2, ≥3

^cCategory (Total number of condomless receptive anal sex with men in the past 3 months): 0, 1, 2, ≥3

^dCategory (Total number of insertive anal sex with men in the past 3 months): 0, 1–2, 3–4, ≥5

^eCategory (Total number of condomless insertive anal sex with men in the past 3 months): 0, 1, 2, ≥3

^fCategory (Total number of lifetime female sexual partners): 0, 1, ≥2

^gCategory (Total number of vaginal sex with women in the past 3 months): 0, 1–2, ≥3

^hCategory (Total number of condomless vaginal sex with women in the past 3 months): 0, 1–2, ≥3