Variables β SE Wald Df sig. HR 95% CI  for HR
Age at marriage
15 0.436 0.179 5.929 1 0.014 1.546 (1.09, 2.19)
16–20 0.444 0.195 5.185 1 0.022 1.559 (1.06, 2.28)
>20 (R) 0 1
Weight
<50 kg -0.357 0.136 6.843 1 0.009 0.699 (0.53, 0.91)
50 kg (R) 0 1
Height
<150 cm 0.272 0.133 4.207 1 0.04 1.314 (1.01, 1.70)
150 cm (R) 0 1
Antenatal care
Yes -0.397 0.136 8.509 1 0.003 0.672 (0.51, 0.88)
No (R) 0 1
Place of delivery
Home 0.392 0.142 7.651 1 0.006 1.481 (1.12, 1.96)
Institutional (R) 0 1
Duration of labor
<2 day -0.397 0.151 6.869 1 0.008 0.481 (0.29, 0.79)
2–4 day -0.727 0.249 8.474 1 0.003 0.67 (0.49, 0.90)
>4 day (R) 0 1
Dur. of incontinence
3 month 0.489 0.151 10.452 1 0.001 1.631 (1.17, 2.23)
4–7 month 0.501 0.176 2.852 1 1.60E-05 1.65 (1.21, 2.19)
>7 month(R) 0 1
Mode of delivery
Vaginal -0.615 0.154 15.904 1 6.66E-05 0.541 (0.39, 0.73)
Others (R) 0 1
Length
2 cm -0.908 0.16 0.32 1 0.571 0.512 (0.31, 0.86)
3-5 cm -0.667 0.263 6.426 1 0.011 0.913 (0.67, 1.25)
>5 cm(R) 0 1
Width
2 cm -0.293 0.152 3.717 1 0.053 0.343 (0.17, 0.67)
3-5 cm -1.069 0.345 9.61 1 0.002 0.746 (0.55, 1.00)
>5 cm(R) 0 1
Status of urethra
Intact -0.609 0.151 16.402 1 5.12E-05 0.544 (0.40, 0.73)
Partially damaged -0.537 0.294 3.327 1 0.068 0.585 (0.33, 1.04)
Compl. destructed(R) 0
AIC        2805.54            
SE: Standard Error; Df: Degree of freedom; HR: Hazard Ratio; CI: Confidence Interval; R: Reference
Table 2: The parameter estimates, standard errors and the hazard ratios of the Cox proportional hazards model of obstetric fistula patients (at Yirgalem Hamlin Fistula
Hospital, during (2011-2012).