Hb levels in relation to birth order in dichorionic (DC) twin pairs delivered vaginally or through caesarean section (CS)
| Twin pairs delivered vaginally (n=194) | Twin pairs delivered through CS (n=96) | p Value | |||||
|---|---|---|---|---|---|---|---|
| Twin 1 | Twin 2 | p Value | Twin 1 | Twin 2 | p Value | ||
| Hb level at birth—g/dL*† | 15.9±2.6 | 16.7±2.6 | <0.01 | 16.7±2.6 | 16.8±2.7 | 0.98 | |
| Hb level on day 2—g/dL*‡ | 15.0±2.7 | 15.8±2.8 | <0.01 | 16.4±2.8 | 17.0±2.8 | 0.63 | |
| Hb difference at birth—g/dL*† | 1.8 (0.8–3.3) | 1.9 (0.9–3.0) | 0.75 | ||||
| Hb difference on day 2—g/dL*‡ | 1.8 (0.8–3.0) | 1.3 (0.5–2.6) | 0.08 | ||||
| Hb difference >8 g/dL at birth—n (%)† | 0 (0%) | 0 (0%) | 0.99 | ||||
| Hb difference >8 g/dL on day 2—n (%)‡ | 0 (0%) | 0 (0%) | 0.99 | ||||
*Values given as mean±SD or median (IQR).
†Hb levels at birth were available in 152 twin pairs delivered vaginally and in 82 twin pairs delivered through CS.
‡Hb levels on day 2 were available in 138 twin pairs delivered vaginally and in 59 twin pairs delivered through CS.
Hb, haemoglobin.