Table 4.
Effect of using varying thresholds of arterial cord pH at birth on accuracy to predict neonatal morbidity and mortality
| Variables | Odds ratio (95% CI) | Overall odds ratio (95% CI); estimated predictive interval |
|---|---|---|
| Neonatal mortality | ||
| pH threshold 7.00: | ||
| Baenziger et al 199950 | 3.00 (0.1 to 73.6) | 6.1 (0.90 to 41.6); 0.0-20 406.6 |
| Haddad et al 200062 | 1.07 (0.2 to 7.3) | |
| Heller et al 20031 | 16.9 (9.2 to 31.1) | |
| Ingemarrson et al 199768 | 20.8 (1.0 to 439.0) | |
| pH threshold 7.10: | ||
| Beeby et al 19944 | 2.9 (1.6 to 5.4) | 7.1 (3.3 to 15.3); 0.8-64.3 |
| Heller et al 20031 | 10.6 (7.4 to 15.1) | |
| Holmes et al 200166 | 5.8 (0.2 to 155.3) | |
| Vintzileos et al 199390 | 18.8 (3.4 to 105.2) | |
| Yudkin et al 199489 | 25.9 (1.3 to 518.6) | |
| pH threshold 7.20: | ||
| Bresadola et al 199551 | 11.8 (5.2 to 26.8) | 4.3 (2.2 to 8.7); 0.5-40.7 |
| Casey et al 200153 | 1.9 (0.7 to 4.9) | |
| Heller et al 20031 | 3.1 (2.3 to 4.1) | |
| Kato et al 19965 | 29.0 (1.4 to 10.5) | |
| Luthy et al 198774 | 3.6 (1.2 to 10.5) | |
| Neonatal morbidity | ||
| pH threshold 7.00: | ||
| Baenziger et al 199950 | 2.7 (0.2 to 45.1) | 12.5 (6.1 to 25.6); 1.7-89.9 |
| Engle et al 199956 | 42.4 (2.3 to 782.1) | |
| Graham et al 200260 | 22.9 (1.1 to 494.6) | |
| Gonzalez de Dios 200059 | 9.2 (3.2 to 26.5) | |
| Haddad et al 200062 | 8.0 (0.3 to 255.8) | |
| Hernandez et al 199363 | 2.4 (0.8 to 7.4) | |
| Ingemarrson et al 199768 | 18.5 (3.8 to 89.6) | |
| Larma et al 200770 | 8.6 (1.1 to 69.7) | |
| Loh et al 199872 | 92.1 (3.7 to 2309.1) | |
| Perlman 199676 | 50.3 (2.7 to 955.6) | |
| Silva et al 200880 | 47.4 (2.2 to 1030.3) | |
| Socol 199481 | 14.4 (0.7 to 311.8) | |
| Valentin et al 199385 | 1.8 (0.2 to 15.8) | |
| Van den Berg 199610 | 10.0 (1.2 to 80.5) | |
| Gilstrap et al 198958 | 169.9 (22.5 to 1281.4) | |
| pH threshold 7.10: | ||
| Beeby et al 19944 | 3.9 (1.9 to 7.9) | 2.4 (1.3 to 4.2); 0.4-12.7 |
| Dijxhoorn et al 198641 | 0.3 (0.04 to 13.4) | |
| Ertan et al 200691 | 2.0 (0.9 to 4.5) | |
| Hernandez et al 199363 | 1.6 (0.6 to 4.1) | |
| Holmes et al 200166 | 3.1 (0.1 to 75.5) | |
| Huisjes 197967 | 4.8 (2.6 to 8.7) | |
| Silva et al 200880 | 14.7 (4.3 to 50.6) | |
| Tejani 198983 | 1.2 (0.3 to 4.3) | |
| Valentin et al 199385 | 0.8 (0.2 to 3.9) | |
| Salafia et al 199578 | 0.7 (0.04 to 13.4) | |
| pH threshold 7.20: | ||
| Blackwell et al 200152 | 1.0 (0.3 to 4.2) | 2.2 (1.3 to 3.7); 0.5-9.9 |
| Casey et al 200153 | 3.1 (1.8 to 5.3) | |
| Dijxhoorn et al 198641 | 1.4 (0.6 to 3.0) | |
| Hernandez et al 199363 | 1.6 (0.7 to 3.9) | |
| Luthy et al 198774 | 5.5 (1.9 to 15.7) | |