Table 2.

Comparison of Risk Ratio for Count of Sexual Risk Behaviors.

	Study interest		Reference type		GEE-Negative binomial
	Condom	Partner	Condom	Partner	IRR	95% CI		P-value
Main effects
	condomless		condom use		2.10	1.91	2.32	<.0001
		non-primary		primary	0.40	0.36	0.43	<.0001
Interactions
	condom use	non-primary	condom use	primary	0.56	0.49	0.64	<.0001
	condom use	non-primary	condomless	non-primary	0.85	0.73	0.98	0.029
	condom use	non-primary	condomless	primary	0.25	0.22	0.28	<.0001
	condom use	primary	condomless	non-primary	1.51	1.29	1.76	<.0001
	condom use	primary	condomless	primary	0.44	0.39	0.50	<.0001
	condomless	non-primary	condomless	primary	0.29	0.26	0.33	<.0001