Table 2.

The effects of predictors on pregnancy spacing

predictors	Coef (β)	HR	Se(β)	95% CI for HR	p-value
Mother predictors
Contraception use	0.849	2.337	0.136	1.23–2.76	< 0.001
age of mother at marriage	−0.659	1.931	0.003	1.63–2.02	< 0.001
Breast feeding duration of previous child	0.587	1.798	0.147	1.35–2.02	< 0.001
BMI of mother	0.523	1.687	0.447	1.51–2.86	0.012
First menstrual age	− 0.001	0.995	0.013	0.31–1.24	0.710
Mother having job	0.023	1.023	0.064	0.23–1.74	0.713
Mother drug use	−0.012	1.012	0.108	0.26–1.94	0.895
Mother underlying diseases (BP, Diabetes, kidney disease)	−0.013	1.013	0.107	0.98–1.78	0.891
Education
Primary and Middle school	−0.011	1.011	0.107	0.21–1.72	0.891
High school	−0.063	1.065	0.097	0.37–1.54	0.359
University education	−0.074	1.076	0.094	0.31–1.61	0.281
night job of mother	0.066	1.068	0.096	0.28–1.74	0.469
Mode of delivery (vaginal, C-section)	0.038	1.038	0.074	0.41–1.72	0.621
Husband predictors
Education
Primary and Middle school	−0.018	1.018	0.074	0.38–1.61	0.511
High school	−0.036	1.036	0.074	0.32–1.97	0.632
University education	0.421	1.523	0.357	1.33–2.48	0.035
Husband drug use	0.038	1.038	0.056	0.29–1.92	0.499
Night job of husband	0.012	1.012	0.107	0.24–1.89	0.751
Family and Child predictors
Income sufficiency	0.716	2.046	0.039	1.61–3.02	0.018
Mother’s awareness of optimum pregnancy spacing	0.447	1.564	0.227	1.33–2.48	0.021
Sex preference of mother (boy prefer)	−0.802	2.231	0.432	1.24–2.81	0.023
Presence of abortion or still birth in preceding pregnancy	−0.604	1.831	0.448	1.27–2.93	0.033
Sex preference of husband (boy prefer)	−0.045	1.046	0.056	0.61–1.84	0.478

Coef Coefficient, HR Hazard Ratio, Se standard error, CI Confidence Interval, P-value < 0.05 was significant and is bold in the table.