Method | Sensitivity, percent | Specificity, percent | PPV, percent | NPV, percent |
Maternal estimate: parous women estimate of weight >4000 g[1] | 56 | 94 | 77 | 86 |
Clinician's estimate of weight >4000 g[2,15] | 10 to 43 | 99.0 to 99.8 | 28 to 53 | - |
Sonographic estimates for weight >4000 g unless otherwise specified [1-16] | ||||
1. AC | ||||
for weight >4000 g | 77 | 75 | 91 | 50 |
for weight >4500 g | 89 | 94 | 93 | 89 |
2. Serial ACs | 84 | 94 | 93 | 89 |
3. FL and AC | 63 | - | 68 | - |
4. AC and BPD | 65 | 90 | - | - |
5. BPD and AC and FL | ||||
for weight >4000 g | 71 | 92 | 55 | 96 |
for weight >4500 g | 22 to 44 | 99 | 30 to 44 | 97 to 99 |
6. BPD and AC and FL adjusted by maternal characteristics | 86 | 95 | - | - |
7. Abdominal wall thickness >11 mm | ||||
70 | 96 | Less than 50 | - |
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