Mortality rates and calculated rate ratio
| Author | Mortality rate/1000 deliveries pre-HBB | Mortality rate/1000 deliveries post-HBB | 95% CI | P value | RR |
| Mortality rates of deliveries | |||||
| Perinatal mortality | |||||
| Bellad et al | 25.4 | 23.4 | −3.11 to 7.80 | 0.39 | 0.92 |
| Kc et al | 30.9 | 23.3 | – | <0.001 | 0.75 |
| Intrapartum-related stillbirths | |||||
| Arabi et al | 10.5 | 3.3 | – | 0.003 | 0.31 |
| Bellad et al | 12.5 | 9.5 | −0.21 to 7.70 | 0.06 | 0.76 |
| Goudar et al | 17.2 | 9.2 | 0.37 to 0.78 | ≤0.001 | 0.53 |
| Kc et al | 9.0 | 3.2 | 0.32 to 0.66 | <0.001 | 0.36 |
| Mduma et al | 16.0 | 14.5 | – | 0.517 | 0.91 |
| Msemo et al | 19.0 | 14.4 | 0.64 to 0.90 | 0.001 | 0.76 |
| Mortality rate of live births | |||||
| 1-day neonatal mortality | |||||
| Bellad et al | 19.4 | 18.6 | −3.65 to 5.26 | 0.72 | 0.96 |
| Kc et al | 5.2 | 1.9 | – | <0.001 | 0.37 |
| Mduma et al | 11.1 | 7.2 | 0.41 to 0.98 | 0.04 | 0.65 |
| Msemo et al | 13.4 | 7.1 | 0.43 to 0.65 | <0.0001 | 0.53 |
| Wrammert et al | 5.5 | 1.9 | – | <0.01 | 0.35 |
| 7-day neonatal mortality | |||||
| Arabi et al | 13.5 | 4.3 | – | 0.001 | 0.32 |
| Bellad et al | 13.0 | 14.0 | −5.45 to 2.64 | 0.49 | 1.08 |
| Wrammert et al | 9.8 | 7.7 | – | 0.08 | 0.81 |
| 7–28-day neonatal mortality | |||||
| Wrammert et al | 3.0 | 4.1 | – | 0.17 | 1.37 |
| 28-day neonatal mortality | |||||
| Goudar et al | 18.0 | 19.0 | 0.80 to 1.47 | 0.59 | 1.06 |
| Wrammert et al | 12.8 | 11.7 | – | 0.46 | 0.91 |
RR, rate ratio.