Table 4.

GEE Empirical Significance Tests and Effect Size Estimates for the Intervention Effect Averaged Over the 6- and 12-month Follow-up Assessments Unadjusted for Baseline Prevalence and Adjusted for Baseline Prevalence, Alice, South Africa 2008-2010

	Unadjusted for Baseline			Adjusted for Baseline
Outcome	Estimate (95% CI)	Cohen’s d	p value	Estimate (95% CI)	Cohen’s d	p value
Met physical activity guideline	2.82 (1.12, 7.11)	0.63	.028	3.35 (1.33, 8.41)	0.73	0.010
Days vigorous aerobic activity	1.66 (1.11, 2.50)	0.38	.014	2.01 (1.43, 2.83)	0.64	<0.001
Days moderate aerobic activity	1.59 (1.13, 2.23)	0.41	.008	1.40 (1.01, 1.95)	0.31	0.044
Days strength-building activity	1.52 (0.97, 2.37)	0.28	.067	1.37 (0.91, 2.07)	0.23	0.128
Met 5-a-Day guideline	1.34 (0.53, 3.38)	0.18	.540	0.98 (0.35, 2.73)	−0.01	0.966
Servings of fruit per day	0.04 (−0.66, 0.75)	0.02	.905	−0.16 (−0.81, 0.48)	0.07	0.622
Servings of vegetables per day	0.05 (−0.52, 0.63)	0.03	.853	−0.06 (−0.64, 0.52)	0.03	0.836
Servings of fried food per day	−0.32 (−0.61, −0.04)	0.34	.027	−0.31 (−0.60, −0.02)	0.32	0.037

Note. Estimate = Odds ratio (Health intervention versus HIV/STD control) for binary outcome variables meeting physical activity and 5-a-Day diet guideline; estimate = risk ratio (Health intervention versus HIV/STD control) for count variables number of days of vigorous aerobic activity, moderate aerobic activity, and strength-building activity; estimate = mean difference (Health intervention - HIV/STD control) for continuous outcomes on other health behaviors. Cohen’s d =is an effect size estimate in standard deviation units calculated using the Cox method for odds ratios and the Z test statistic and N from the GEE analysis for continuous and count variables. Physical activity is in the past 7 days. Diet is in the past 30 days.