Table 5 Factors associated with blood loss
N | Blood Loss (mL) | |||
|---|---|---|---|---|
Median (IQR) | Geometric Mean | p-Value | ||
mWHO Grade | < 0.001 | |||
Controls | 5254 | 250 (177–350) | 244.4 | |
1–2 | 105 | 300 (200–500) | 276.0 | |
3–4 | 54 | 400 (200–500) | 326.4 | |
Age at Delivery | 0.016 | |||
< 25 Years | 1248 | 250 (150–350) | 240.2 | |
25–29 Years | 1831 | 250 (150–350) | 244.1 | |
30–34 Years | 1622 | 250 (200–400) | 247.4 | |
35+ Years | 712 | 250 (200–400) | 256.0 | |
BMI | 0.014 | |||
≤ 25 | 2535 | 250 (200–350) | 244.8 | |
25–30 | 1455 | 250 (200–400) | 253.2 | |
> 30 | 589 | 250 (199–400) | 251.5 | |
Parity | < 0.001 | |||
0 | 2637 | 300 (200–400) | 281.6 | |
1 | 1613 | 200 (150–300) | 222.4 | |
2 | 691 | 200 (150–300) | 209.3 | |
3+ | 443 | 200 (100–300) | 199.3 | |
Gestation at Delivery (Completed weeks) | < 0.001 | |||
< 40 Weeks | 2212 | 200 (150–300) | 226.5 | |
40+ Weeks | 3200 | 250 (200–400) | 259.9 | |
Baby Weight | < 0.001 | |||
< 3.0 kg | 949 | 200 (150–300) | 213.6 | |
3.0–3.4 kg | 2280 | 250 (150–350) | 237.8 | |
3.5–3.9 kg | 1705 | 250 (200–400) | 259.0 | |
4.0+ kg | 473 | 300 (200–450) | 314.4 | |
Mode of Delivery | < 0.001 a | |||
Spontaneous Vaginal | 4130 | 200 (150–300) | 214.7 | |
Ventouse | 320 | 300 (200–400) | 279.7 | |
Forceps | 539 | 350 (250–500) | 353.4 | |
Caesarean Section | 424 | 500 (400–700) | 521.9 | |
Manual Removal | < 0.001 b | |||
No | 5376 | 250 (193–350) | 244.8 | |
Yes | 37 | 400 (250–700) | 416.3 | |