Original cohort | P | Matched cohort | P | |||
---|---|---|---|---|---|---|
BT group (n = 322) | NBT group (n = 909) | BT group (n = 312) | NBT group (n = 312) | |||
Age (mean ± SD, years) | 33.49 ± 4.51 | 32.97 ± 4.23 | 0.066 | 33.49 ± 4.51 | 32.97 ± 4.26 | 0.139 |
BMI (kg/m2) | 27.5 (23.5–35.3) | 26.0 (21.7–33.6) | 0.425 | 27.5 (23.5–35.3) | 26.0 (20.7–32.6) | 0.526 |
ASA (n,%) | 0.811 | |||||
I–II | 283(87.5%) | 842(92.6%) | 0.005 | 273(87.5%) | 271(86.9%) | |
III | 39(12.5%) | 67(7.4%) | 39(12.5%) | 41(13.1%) | ||
Age at delivery (mean ± SD, days) | 273.11 ± 22.11 | 272.66 ± 20.66 | 0.745 | 273.11 ± 22.11 | 274.66 ± 20.36 | 0.363 |
Birthweight (mean ± SD, g) | 3488.31 ± 1006.69 | 3073.16 ± 1078.84 | < 0.001 | 3488.31 ± 1006.69 | 3423.16 ± 1086.85 | 0.262 |
Mode of anesthesia (n,%) | 0.192 | 0.893 | ||||
General | 41(10%) | 69(7.6%) | 31(10%) | 30(9.6%) | ||
Neuraxial | 281(90%) | 840(92.4%) | 281(90%) | 282(90.4%) | ||
Primary cause of PPH (n,%) | 0.987 | 0.993 | ||||
Uterine atony | 128(41%) | 378(41.8%) | 128(41.0%) | 127(40.8%) | ||
Placenta accreta | 80(22.4%) | 195(21.5%) | 70(22.4%) | 68(21.9%) | ||
Retained placenta | 102(32.6%) | 300(33%) | 102(32.6%) | 104(33.2%) | ||
Others | 12(4%) | 36(3.7%) | 12(4%) | 13(4.1%) | ||
Operation time (mean ± SD, min) | 55.20 ± 8.54 | 42.64 ± 7.83 | < 0.001 | 55.20 ± 8.54 | 40.64 ± 7.13 | < 0.001 |
Blood loss (mean ± SD, ml) | 831.65 ± 78.35 | 241.39 ± 83.61 | < 0.001 | 831.65 ± 78.35 | 236.39 ± 80.21 | < 0.001 |
Pre-Hgb (mean ± SD, g/dl) | 101.72 ± 33.28 | 119.67 ± 25.33 | < 0.001 | 101.72 ± 33.28 | 112.67 ± 45.33 | < 0.001 |
Obstetrician experience | 0.427 | 0.878 | ||||
< 5 years | 39(9%) | 69(7.6%) | 29(9%) | 27(8.6%) | ||
5 years or more | 283(91%) | 840(92.4%) | 283(91%) | 285(91.4%) |