Table A5.

Relative risk ratios from two-level multinomial logistic regression models of school socioeconomic composition on sexual initiation between two waves (ref: (1) had no sex by wave 2), by constituent socioeconomic measure of school and by gender, 2011–2013

	(1)		(2)		(3)		(4)		(5)		(6)
	(1) had no sex by wave 2 vs. (3) already had sex by wave 1	(1) had no sex by wave 2 vs. (4) lost-to- follow- up at wave 2	(1) had no sex by wave 2 vs. (3) already had sex by wave 1	(1) had no sex by wave 2 vs. (4) lost-to- follow- up at wave 2	(1) had no sex by wave 2 vs. (3) already had sex by wave 1	(1) had no sex by wave 2 vs. (4) lost-to- follow- up at wave 2	(1) had no sex by wave 2 vs. (3) already had sex by wave 1	(1) had no sex by wave 2 vs. (4) lost-to- follow- up at wave 2	(1) had no sex by wave 2 vs. (3) already had sex by wave 1	(1) had no sex by wave 2 vs. (4) lost-to- follow- up at wave 2	(1) had no sex by wave 2 vs. (3) already had sex by wave 1	(1) had no sex by wave 2 vs. (4) lost-to- follow- up at wave 2
% Top 10% wealth index	0.950***	0.986					0.990	1.000
% Parent’s secondary school completed			0.980***	0.991					0.999	1.000
% Father’s high occupational status					0.968**	0.985					0.999	0.992
Individual-level
Female
Age	1.543***	1.189***	1.545***	1.185***	1.546***	1.187***	1.789***	1.131***	1.792***	1.131***	1.793***	1.129***
Chewas (ref.)
Tumbuka	1.092	1.241	1.070	1.275	1.062	1.269	0.695	1.149	0.674	1.148	0.674	1.165
Yao	1.573*	1.706**	1.575*	1.741**	1.559*	1.732**	0.677	0.936	0.656	0.934	0.656	0.949
Ngoni	0.992	1.025	0.989	1.041	0.983	1.038	1.574*	0.885	1.537*	0.884	1.538*	0.893
Others	1.324	1.214	1.310	1.239	1.297	1.235	0.948	0.882	0.923	0.880	0.923	0.893
Math performance	0.967	0.929	0.969	0.927	0.968	0.927	0.786*	0.914*	0.787*	0.914*	0.788*	0.913*
Top 10% wealth index (CWC)	0.912	1.263					1.131	1.391*
Parent’s secondary education completed (CWC)			1.136	1.372**					0.849	1.015
Father’s high occupational status (CWC)					0.819	0.865					1.160	1.210*
Top 10% wealth index			0.888	1.292	0.883	1.286			1.101	1.392*	1.096	1.401*
Parent’s secondary education completed	1.127	1.356**			1.124	1.369**	0.864	1.017			0.849	1.028
Father’s high occupational status	0.811	0.863	0.816	0.868			1.177	1.201*	1.162	1.202*
Both parents (ref.)
Mother only	0.772	0.902	0.770	0.907	0.769	0.907	1.010	1.140	1.001	1.139	1.004	1.144
Father only	1.693*	1.230	1.686	1.234	1.692	1.232	0.624	1.220	0.622	1.220	0.622	1.222
No parents	2.147***	1.497*	2.120***	1.505*	2.092***	1.501*	0.418*	1.326	0.411*	1.325	0.411*	1.335
School-level
Average class size	0.994	0.992	1.000	0.995	0.999	0.994	0.998	0.996	0.999	0.997	0.999	0.997
Rurality	0.630*	1.299	0.533*	1.065	0.683	1.291	1.458	1.383	1.632	1.416	1.546	1.268
Conventional	0.861	1.151	0.740	1.107	0.707	1.082	0.699	0.710	0.701	0.712	0.679	0.674
Secondary School
% Have ever repeated	0.996	1.018	0.992	1.011	0.995	1.015	1.008	1.024	1.013	1.025	1.010	1.018
% Satisfied with school	0.984*	0.977*	0.984*	0.977*	0.984*	0.977*	1.011	1.004	1.010	1.004	1.010	1.004
Mean study after school	0.577	0.364*	0.508	0.334*	0.674	0.383	1.192	1.182	1.177	1.164	1.230	1.300
Constant	0.021	12.498	0.050	28.637	0.009	10.863	0.000***	0.029	0.000***	0.030	0.000***	0.024*
N (Schools)	33	33	33	33	33	33	33	33	33	33	33	33
N (Students)	3950	3950	3950	3950	3950	3950	3966	3966	3966	3966	3966	3966

^*p < 0.05,

^**p < 0.01

^***p < 0.001