Table 1.
Direct blood loss measurement | Indirect blood loss measurement | p-value a | |
---|---|---|---|
(n = 450) | (n = 450) | ||
Maternal age in years: median (range) | 25 (17–37) | 24 (18–39) | 0.58 |
Parity: median (range) | 1 (0–4) | 1 (0–4) | 0.96 |
Gravidity: median (range) | 2 (1–7) | 2 (1–6) | 0.69 |
Gestational age in weeks: median (range) | 39 (28–43) | 39 (28–43) | 0.62 |
Nulliparous: % (n) | 47.3 (213) | 48.9 (220) | 0.69 |
Pre-delivery hemoglobin: median (range) | 11.2 (6.1–15.3)b | 11.3 (5.5–16.3)c | 0.27 |
Type of delivery: % (n) | 0.90 | ||
Vaginal | 91.8 (413) | 92.2 (415) | |
Forceps | 8.2 (37) | 7.8 (35) | |
Delivery outcome: % (n) | > 0.99 | ||
Singleton (live birth) | 99.3 (447) | 99.1 (446) | |
Twins (live birth) | 0.2 (1) | 0.4 (2) | |
Triplets (live birth) | 0.2 (1) | 0.0 (0) | |
Singleton (stillborn) | 0.2 (1) | 0.2 (1) | |
Twins (stillborn) | 0.0 (0) | 0.2 (1) | |
One or more complications (including vaginal or perineal tears): % (n) | 1.1 (5) | 2.4 (11) | 0.21 |
aCalculated with the Wilcoxon rank-sum test and Fisher’s exact test.
bn = 422.
cn = 416.