Table 1 Association between age at first sex (AFS) and time from sexual debut to marriage with subsequent marital breakdown and polygamy

Outcome and population	Predictor variable	Unadjusted estimates	Estimates adjusted for age last birthday and other predictor
Outcome and population	Predictor variable	Proportionate effect on OR of 1 year increase in predictor (95% CI)	Proportionate effect on OR of 1 year increase in predictor (95% CI)
Marital instability
Men
N = 3385	AFS	0.98 (0.95 to 1.01)	0.97 (0.94 to 0.99)
N = 3292	TSSSA	0.98 (0.96 to 0.99)	0.97 (0.95 to 0.99)
Women
N = 5064	AFS	0.91 (0.89 to 0.94)	0.91 (0.89 to 0.94)
N = 4991	TSSSA	0.98 (0.96 to 1.00)	0.98 (0.96 to 1.00)
Polygamy
Men
N = 3084	AFS	0.94 (0.90 to 0.99)	0.88 (0.84 to 0.93)
N = 3011	TSSSA	0.92 (0.89 to 0.96)	0.90 (0.87 to 0.93)
Women
N = 4220	AFS	0.96 (0.92 to 0.99)	0.95 (0.91 to 0.98)
N = 4165	TSSSA	0.95 (0.92 to 0.98)	0.95 (0.93 to 0.98)

AFS, age at first sex; CI, confidence interval; OR, odds ratio; TSSSA, time spent single and sexually active.