From: Gestational age as a predictor for subsequent preterm birth in New South Wales, Australia
Preterm Birth of Second Child | |||||||||
---|---|---|---|---|---|---|---|---|---|
Sensitivity (%, 95 Confidence Interval c) | Positive Predictive Value (%, 95 Confidence Interval c) | ||||||||
< 28 weeks | < 32 weeks | < 34 weeks | < 37 weeks | < 28 weeks | < 32 weeks | < 34 weeks | < 37 weeks | ||
Preterm Birth of First Child | < 28 weeks | 6.57 (5.46–7.88) | 5.64 (4.94–6.43) | 4.76 (4.26–5.32) | 2.60 (2.40–2.81) | 4.35 (3.62–5.24) | 8.47 (7.43–9.63) | 12.17 (10.94–13.52) | 25.32 (23.64–27.07) |
< 32 weeks | 10.62 (9.22–12.21) | 11.31 (10.32–12.37) | 10.33 (9.60–11.10) | 6.04 (5.75–6.35) | 3.26 (2.82–3.78) | 7.87 (7.17–8.63) | 12.23 (11.37–13.14) | 27.29 (26.11–28.50) | |
< 34 weeks | 14.06 (12.45–15.83) | 15.75 (14.61–16.97) | 15.01 (14.15–15.91) | 10.07 (9.70–10.46) | 2.61 (2.30–2.97) | 6.62 (6.12–7.16) | 10.74 (10.11–11.40) | 27.49 (26.56–28.43) | |
< 37 weeks | 24.00 (21.99–26.14) | 27.17 (25.76–28.63) | 28.12 (27.02–29.25) | 25.22 (24.67–25.77) | 1.28 (1.16–1.41) | 3.28 (3.09–3.49) | 5.78 (5.53–6.05) | 19.78 (19.34–20.23) | |
Specificity (%, 95 Confidence Interval c) | Negative Predictive Value (%, 95 Confidence Interval c) | ||||||||
< 28 weeks | < 32 weeks | < 34 weeks | < 37 weeks | < 28 weeks | < 32 weeks | < 34 weeks | < 37 weeks | ||
< 28 weeks | 99.54 (99.53–99.56) | 99.56 (99.54–99.58) | 99.58 (99.56–99.60) | 99.63 (99.61–99.64) | 99.70 (99.69–99.72) | 99.32 (99.30–99.35) | 98.84 (98.81–98.87) | 95.47 (95.42–95.53) | |
< 32 weeks | 99.01 (98.98–99.03) | 99.05 (99.02–99.08) | 99.09 (99.06–99.12) | 99.22 (99.19–99.24) | 99.72 (99.70–99.73) | 99.36 (99.34–99.38) | 98.90 (98.87–98.93) | 95.61 (95.55–95.66) | |
< 34 weeks | 98.34 (98.31–98.38) | 98.41 (98.37–98.44) | 98.47 (98.43–98.50) | 98.71 (98.68–98.74) | 99.72 (99.71–99.74) | 99.39 (99.37–99.41) | 98.95 (98.92–98.98) | 95.77 (95.71–95.82) | |
< 37 weeks | 94.16 (94.10–94.22) | 94.26 (94.19–94.32) | 94.38 (94.31–94.44) | 95.04 (94.98–95.10) | 99.75 (99.73–99.76) | 99.45 (99.43–99.47) | 99.07 (99.05–99.10) | 96.32 (96.27–96.38) |