Table 2a.

HLM models of the effects of partner and relationship characteristics on rate of unprotected sex 2a. Multivariate HLM model of the effects of partner and relationship characteristics on rate of unprotected sex in a given sexual partnership (N = 413 partnerships)

Fixed Effect	Event RateRatio	95% Confidence Interval	Coefficient Value	Standard Error	p value
Intercept (rate of unprotected vaginal or anal sex)	0.57	0.38 – 0.87	−0.56	0.21	< .01
Serious relationship	7.82	5.60 – 10.92	2.06	0.17	< .001
Female partner	2.93	0.47 – 18.30	1.08	0.93	.25
Partner age difference	1.20	1.02 – 1.40	0.18	0.08	< .05
Drug use prior to sex with partner	1.45	1.15 – 1.84	0.37	0.12	< .01
Hit, slapped, punched, or hurt by partner	1.88	1.13 – 3.13	0.63	0.26	< .05
Forced to have sex when didn’t want to	5.46	1.64 – 18.25	1.70	0.61	< .01
Partner repeated from prior 6 month wave	1.62	1.17 – 2.24	0.48	0.17	< .01
Partner met online	0.81	0.48 – 1.35	−0.21	0.26	.41