Table 4 Sensitivity, Specificity, PPV and NPV for different methods to distinguish between term and preterm deliveries (< 37 gestational weeks)
Indicator | LMP | SFH | BS | p |
|---|---|---|---|---|
Sensitivity (95%CI) | 0.63 (0.50–0.75) | 0.80 (0.74–0.85) | 0.42 (0.35–0.49) | 0.093 |
Specificity (95%CI) | 0.72 (0.66–0.76) | 0.74 (0.72–0.76) | 0.77 (0.74–0.79) | < 0.001 |
PPV (95%CI) | 0.28 (0.21–0.36) | 0.35 (0.31–0.39) | 0.23 (0.19–0.27) | < 0.001 |
NPV (95%CI) | 0.92 (0.88–0.95) | 0.96 (0.94–0.97) | 0.89 (0.87–0.91) | < 0.001 |
Area under the curve | 0.67 (0.61–0.74) | 0.77 (0.74–0.80) | 0.59 (0.56–0.63) | 0.0051 |