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Table 2 Frequency and proportion of HRPB symptoms, and the test characteristics of each symptom

From: Detection and risk stratification of women at high risk of preterm birth in rural communities near Nagpur, India

Symptom N (% out of 7050) Sensitivity Specificity Positive Predictive Value Negative Predictive Value
Signs of Preterm Labor 540 (7.66) 49.3% 93.5% 38.8% 95.7%
Premature rupture of membrane 251 (3.56) 52.6% 91.9% 19.2% 98.1%
Hemorrhage 71 (1.01) 64.8% 90.8% 6.7% 99.6%
Hypertension 132 (1.87) 37.9% 90.8% 7.3% 98.7%