Table 1.

A multilevel model treating “unprotected anal or vaginal sex acts” as a Poisson outcome. Variables listed at Level 2 are cross-level moderators of the effects of Level 1 variables on the outcome. Mean NA, at Level 3, controls for individual differences in the average self-reported intensity of NA across days

Level 1	Level 2	Level 3	B	t (df)	ERR	p value
0. Intercept			−3.313	−39.277 (121)	0.036	0.000
1. Casual			1.505	6.403 (124)	4.505	0.000
	HIV+		0.942	3.738 (2812)	2.564	0.000
	High NA	Mean NA	−0.863	−2.259 (2812)	0.422	0.024
2. Low SE			−1.215	−5.535 (123)	0.297	0.000
	High NA		0.501	4.067 (2812)	1.650	0.000
	Craving		0.716	7.040 (2812)	2.047	0.000
3. AU			0.167	2.396 (123)	1.181	0.018
4. SE x AU			0.239	2.141 (2812)	2.141	0.032

Reliability Estimates. 0 = .188; 1 = 0.117; 2 = 0.082; 3 = 0.084; 4 = 0.171

SE=self-efficacy; AU=alcohol use

Not shown: Non-significant Level 3 effects of gender, grand mean-centered sexual craving and NA; also, non-significant Level 2 effect of sexual craving on alcohol use.

Estimation: Penalized Quasi-Likelihood.