Table 4.

Parameter estimates and summaries for the effects of Sex, ASR, the ASR × Sex interaction, and additional district-level measures on the age at first birth (n = 25 268) using Cox proportional hazards model and stratifying by birth year.

parameter	estimate	s.e.	χ2	p-value	Hazard
sex (male)	−0.73606	0.01370	2888.4714	<0.0001	0.479
ASR	0.41206	0.05677	52.6760	<0.0001	1.510
ASR × sex (male)	−0.46638	0.05664	67.7935	<0.0001	0.627
local births	1.51915	0.15962	90.5823	<0.0001	4.568
widow	−1.91036	0.29288	42.5443	<0.0001	0.148
widower	−1.95091	0.60162	10.5155	0.0012	0.142
polygamy	0.70928	0.81578	0.7559	0.3846	2.033
random effect:
district	0.01468	0.002502