Table 3.

DID models estimates of the effect of the SMS on the probability of risk behaviors

Dependent variable	Variable	Coeffificient (β)	Std. Error	t	P
Multiple partners (number of male sexual partners ≥ 2)
	Time	0.29321	0.035	8.323	0.000
	Treated	0.02312	0.039	0.592	0.558
	Time*treated	-0.14568	0.053	-2.771	0.006
Unclear partner infection status
	Time	-0.14411	0.037	-3.858	0.000
	Treated	0.01219	0.039	0.310	0.754
	Time*treated	-0.10530	0.051	-2.062	0.040
Last intercourse without condom
	Time	-0.09669	0.029	-3.274	0.001
	Treated	0.03590	0.033	1.083	0.281
	Time*treated	-0.08108	0.041	-1.973	0.049
Condomless anal intercourse
	Time	-0.09747	0.038	-2.526	0.011
	Treated	0.02478	0.039	0.649	0.525
	Time*treated	-0.16771	0.052	-3.217	0.001
Condomless oral sex
	Time	-0.04243	0.041	-1.032	0.301
	Treated	0.00113	0.040	0.033	0.977
	Time*treated	0.09890	0.058	1.701	0.089
New-type drug use
	Time	0.00444	0.037	0.119	0.905
	Treated	0.03520	0.036	0.974	0.334
	Time*treated	-0.07469	0.053	-1.422	0.156
Group intercourse
	Time	-0.03243	0.025	-1.313	0.190
	Treated	0.002039	0.026	0.078	0.937
	Time*treated	-0.02997	0.034	-0.878	0.378
Commercial Sexual
	Time	-0.04383	0.013	-3.274	0.001
	Treated	-0.01626	0.016	-1.010	0.314
	Time*treated	0.03213	0.019	1.667	0.096