Estimating the effectiveness of self-help groups on the adoption of secondary preventive measures by people living with HIV in Central America, 2012

Table 6 Average effect of treatment for those treated (ATT)

Indicator	Method	Sample Size	Estimator	P value	Standard Error	Confidence Interval
Condom use at last sex	Without matching	3341	0.044	0.005	0.017	0.011	0.078
	Kernel (5000 reps*)	3341	0.004	0.877	0.024	−0.043	0.050
	One-to-one (5000 reps)	3341	−0.025	0.336	0.026	−0.075	0.025
	2nd nearest neighbor (5000 reps)	3341	−0.028	0.274	0.025	−0.078	0.022
	Weighted OLSs¥**	3340	−0.043	0.073	0.024	−0.091	0.004
	2nd nearest neighbor (TEFFECTS***)	3341	−0.030	0.279	0.028	−0.085	0.025
	Instrumental variables ¥	3326	−0.252	0.636	0.533	−1.296	0.792
	Kernel 5000 reps (ATTK***)	3660	0.006	0.412	0.026	−0.045	0.057
Adherence to antiretroviral therapy (ART)	Without matching	3128	0.070	0.000	0.015	0.041	0.099
	Kernel (5000 reps)	3128	0.036	0.096	0.022	−0.006	0.079
	One-to-one (5000 reps)	3128	0.044	0.086	0.026	−0.006	0.094
	2nd nearest neighbor (5000 reps)	3128	0.042	0.113	0.026	−0.010	0.093
	WLS ¥	3127	0.035	0.107	0.022	−0.008	0.078
	2nd nearest neighbor (TEFFECTS)	3128	0.023	0.383	0.027	−0.029	0.076
	Instrumental variables ¥	3119	0.128	0.740	0.387	−0.629	0.886
	Kernel 5000reps (ATTK)	3128	0.023	0.175	0.025	−0.026	0.072

Source: prepared by the author based on data from the project, Elaboration of the risk profile of people living with HIV in the beneficiary countries of the REDCA+ Regional Program
*reps bootstrap replications
**¥Estimates were based on sample weights
***TEFECTS Stata command
****ATTK effect of treatment for those treated by Kernel matching

ISSN: 1472-6963