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Predictive characteristics of ‘optimal cut-offs’ of umbilical arterial lactate and pH for predicting composite neonatal morbidity (N=4910)
| Lactate | pH | |
|---|---|---|
| ‘Optimal’ cut-off | >3.9 mmol/L | <7.25 |
| Sensitivity (95% CI) | 83.9 (71.9, 92.4) | 75.0 (61.6, 85.6) |
| Specificity (95% CI) | 74.1 (72.9, 75.4) | 70.6 (69.3, 71.9) |
| Positive predictive value (95% CI) | 3.6 (2.7, 4.8) | 2.9 (2.1, 3.9) |
| Negative predictive value (95% CI) | 99.8 (99.5, 99.9) | 99.6 (99.3, 99.8) |
