Table 3 Adjusted odds (95% CI) of overall cesarean, primary cesarean and VBAC in Taiwan, 2006-2007
| Â | Total cesarean (n = 128,320) | Primary cesarean, (n = 53,186) | VBAC (n = 2,294) | |||
|---|---|---|---|---|---|---|
| Â | OR (95% C.I.) | p | OR (95% C.I.) | p | OR (95% C.I.) | p |
Ethnicity | ||||||
   Taiwanese* |  |  |  |  |  |  |
   Chinese | 0.90(0.86, 0.94) | 0.000 | 0.90 (0.86, 0.94) | 0.000 | 1.25 (1.02, 1.55) | 0.033 |
   Vietnamese | 0.59(0.56, 0.61) | 0.000 | 0.58(0.55, 0.61) | 0.000 | 1.58 (1.26, 1.97) | 0.000 |
Parental demographics | Â | Â | Â | Â | Â | Â |
Maternal age | ||||||
   Aged 20-35* |  |  |  |  |  |  |
   Aged <20 | 0.84(0.78, 0.91) | 0.000 | 0.85 (0.79, 0.92) | 0.000 | 1.51 (0.88, 2.50) | 0.131 |
   Aged >35 | 1.46(1.41, 1.52) | 0.000 | 1.49(1.44, 1.54) | 0.000 | 0.89 (0.78, 1.01) | 0.062 |
Paternal age, y/o | ||||||
   Aged <25* |  |  |  |  |  |  |
   Aged 25-35 | 1.06(1.02, 1.11) | 0.004 | 1.05((1.00, 1.10) | 0.020 | 0.68 (0.53, 0.88) | 0.003 |
   Aged >35 | 0.98(0.94, 1.03) | 0.429 | 0.97 (0.93, 1.02) | 0.229 | 0.77 (0.60, 1.01) | 0.052 |
Single | 1.04(0.48,2.24) | 0.930 | 0.96 (0.44, 2.08) | 0.959 | XX | |
Maternal/Pregnancy factors | Â | Â | Â | Â | Â | Â |
Previous history of cesarean | 108.6(103.7, 113.6) | 0.000 | Â | Â | Â | Â |
Length of gestation | ||||||
   Term pregnancy* |  |  |  |  |  |  |
   Preterm | 1.37(1.31, 1.43) | 0.000 | 1.43(1.37, 1.49) | 0.000 | 1.37 (1.18, 1.59) | 0.000 |
Prolonged pregnancy | 1.94(1.65, 2.28) | 0.000 | 2.00(1.70, 2.36) | 0.000 | 4.00 (1.67, 9.58) | 0.002 |
Urbanization | ||||||
   Rural* |  |  |  |  |  |  |
   Suburban | 1.06(1.02, 11.0) | 0.003 | 1.07 (1.02, 1.10) | 0.002 | 1.06 (0.89, 1.25) | 0.540 |
   Urban | 1.21(1.17, 1.25) | 0.000 | 1.23 (1.20, 1.27) | 0.000 | 1.04 (0.91, 1.20) | 0.570 |
Neonatal characteristics | Â | Â | Â | Â | Â | Â |
Male | 1.07(1.05, 1.09) | 0.000 | 1.06 (1.05, 1.09) | 0.000 | 0.88 (0.81, 0.96) | 0.006 |
Intermediate birthweight* | Â | Â | Â | Â | Â | Â |
Birthweight <1SD | 1.05(1.01, 1.08) | 0.004 | 1.07(1.03, 1.10) | 0.000 | 1.36 (1.19, 1.55) | 0.000 |
Birthweight >1SD | 1.77(1.72, 1.81) | 0.000 | 1.81 (1.76, 1.86) | 0.000 | 1.04 (0.91, 1.19) | 0.572 |
Maternal medical complications | Â | Â | Â | Â | Â | Â |
DM | 1.23(1.10, 1.38) | 0.000 | 1.25 (1.12, 1.40) | 0.000 | 0.99 (0.65, 1.49) | 0.974 |
Hypertensive | 8.0(7.42, 8.63) | 0.000 | 8.04(7.45,8.67) | 0.000 | 0.39 (0.24, 0.62) | 0.000 |
Major Obstetric complication | 80.7(76.5,85.2) | 0.000 | 87.6(82.9,92.62) | 0.000 | 0.32(0.27, 0.39) | 0.000 |
Institutional setting | ||||||
   Birth in clinic* |  |  |  |  |  |  |
   Birth in Hospital | 0.68(0.67, 0.70) | 0.000 | 0.68(0.66 0.69) | 0.000 | 2.11 (1.89, 2.35) | 0.000 |