Table 4. Odds ratios of Wave 1 explanatory variable to predict transition into first sex by Wave 2, by area of residence.

Variables in the equation	Female	Male
	OR (95% Confidence Interval)	OR (95% Confidence Interval)
Non-slum
16-19 years (ref. 12-15 years)	4.6** (1.2 -17.9)	57.8*** (6.2 -541.9)
Currently in school (ref. not in school)	0.0*** (0.0 - 0.3)	1.9 (0.0 - 117.7)
Number of adolescents in HH (ref. one)
Two	3.0 (0.5 - 18.4)	1.4 (0.2 - 10.2)
Three or more	2.4 (0.4 - 14.6)	2.8 (0.5 - 15.7)
Peer models for conventional behavior a	0.8 (0.4 - 1.4)	0.8 (0.5 - 1.2)
Perceived parental monitoring b	1.4** (1.0 - 1.8)	1.0 (0.8 - 1.1)
Peer models for unconventional behavior c	1.9** (1.1 - 3.2)	1.1 (0.8 - 1.5)
Non-penetrative sexual contact (ref. never)	0.3 (0.0 - 1.4)	0.9 (0.2 - 4.2)
Delinquent behavior d	0.7 (0.2 - 3.0)	0.9 (0.6 - 1.4)
Substance use (ref. never use)	5.8 (0.6 - 60.5)	0.7 (0.2 - 3.3)
Observations	132	154
Wald χ2 (10)	15.93	29.37
Pseudo R2	0.3021	0.3718
Slum
16-19 years (ref. 12-15 years)	2.3** (1.0 - 5.1)	1.7 (0.6 - 4.8)
Currently in school (ref. not in school)	1.2 (0.3 - 4.3)	1.1 (0.1 - 12.6)
Number of adolescents in HH (ref. one)
Two	1.3 (0.6 - 3.1)	1.5 (0.4 - 5.3)
Three or more	0.8 (0.4 - 1.9)	1.5 (0.4 - 5.0)
Peer models for conventional behavior a	0.8* (0.6 - 1.0)	0.8* (0.6 - 1.0)
Perceived parental monitoring b	1.1 (1.0 - 1.1)	1.0 (0.9 - 1.2)
Peer models for unconventional behavior c	0.9 (0.7 - 1.2)	0.8 (0.6 - 1.2)
Non-penetrative sexual contact (ref. never)	0.6 (0.1 - 2.5)	2.5 (0.7 - 8.8)
Delinquent behavior d	1.4*** (1.1 - 1.7)	1.3* (1.0 - 1.6)
Substance use (ref. never use)	0.5 (0.0 - 9.4)	0.9 (0.2 - 4.7)
Observations	318	276
Wald χ2 (10)	16.49	11.96
Pseudo R2	0.0576	0.0670

^aIncreasing values indicate higher levels of peer models for conventional behavior;

^bIncreasing values indicate higher levels of parental monitoring;

^cIncreasing values indicate higher levels of peer models for unconventional behavior;

^dIncreasing values indicate higher levels of delinquent behavior

Note: 95% confidence intervals in parentheses;

^***p<0.01,

^**p<0.05,

^*p<0.1