Table 1. Sensitivity, specificity, predictive values, likelihood ratio for the positive test, and accuracy of neck circumference measurements as a diagnostic method for overweight by gender in 10-year-old school children, Palhoça (SC), Brazil (n=942).
| Accuracy measures for the male | Accuracy measures for the female | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NC (cm) | S (%) | Sp (%) | PPV (%) | NPV (%) | LR+ | A (%) | S (%) | Sp (%) | PPV (%) | NPV (%) | LR+ | A (%) |
| 23.0 | – | 99.2 | – | 58.3 | – | 58.0 | – | 99.3 | – | 62.0 | – | 61.2 |
| 24.0 | – | 99.6 | – | 58.4 | – | 58.2 | – | 94.8 | – | 60.9 | – | 58.9 |
| 25.0 | – | 98.1 | – | 58.0 | – | 57.3 | – | 89.5 | – | 59.6 | – | 55.7 |
| 26.0 | – | 84.8 | 2.4 | 54.5 | – | 49.8 | 2.2 | 80.4 | 6.3 | 57.5 | 0.1 | 50.8 |
| 27.0 | 2.1 | 74.5 | 5.6 | 51.7 | – | 44.4 | 6.5 | 68.0 | 10.9 | 54.5 | 0.2 | 44.7 |
| 28.0 | 10.7 | 67.7 | 19.0 | 57.6 | 0.3 | 44.0 | 17.2 | 81.7 | 36.4 | 61.9 | 0.9 | 57.3 |
| 29.0 | 15.0 | 83.7 | 39.4 | 58.0 | 0.9 | 55.1 | 23.7 | 90.8 | 61.1 | 66.2 | 2.6 | 65.4 |
| 30.0 | 24.1 | 94.3 | 75.0 | 63.6 | 4.2 | 65.1 | 21.5 | 96.4 | 78.4 | 66.9 | 6.0 | 68.1 |
| 31.0 | 18.2 | 98.1 | 87.2 | 62.8 | 9.6 | 64.9 | 13.4 | 99.0 | 89.3 | 65.3 | 13.7 | 66.7 |
| 32.0 | 13.9 | 100.0 | 100.0 | 62.0 | – | 64.2 | 8.1 | 100.0 | 100.0 | 64.2 | – | 65.2 |
| 33.0 | 7.0 | 100.0 | 100.0 | 60.2 | – | 61.3 | 2.7 | 100.0 | 100.0 | 62.8 | – | 63.2 |
| 34.0 | 8.6 | 100.0 | 100.0 | 59.4 | – | 60.9 | 3.2 | 100.0 | 100.0 | 63.0 | – | 63.4 |
| 35.0 | 2.1 | 100.0 | 100.0 | 59.0 | – | 59.3 | 1.1 | 100.0 | 100.0 | 62.4 | – | 62.6 |
| 36.0 | 0.5 | 100.0 | 100.0 | 58.6 | – | 58.7 | – | – | – | – | – | |
| 37.0 | 0.5 | 100.0 | 100.0 | 58.6 | – | 58.7 | 0.5 | 100.0 | 100.0 | 62.3 | – | 62.4 |
| 38.0 | 1.6 | 100.0 | 100.0 | 58.8 | – | 59.1 | – | – | – | – | – | – |
NC: neck circumference; S: sensitivity; Sp: specificity; PPV: positive predictive value; NPV: negative predictive value; LR+: likelihood ratio for the positive test; A: accuracy.