Table 5.
Sensitivity, specificity, positive predictive value and negative predictive value of self-reported BMI classificationsa by sex
| All | Boys | Girls | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Self-reported BMI |
Sn (%) | Sp (%) | PPV (%) | NPV (%) | Sn (%) | Sp (%) | PPV (%) | NPV (%) | Sn (%) | Sp (%) | PPV (%) | NPV (%) |
| Underweight | 77.5 | 94.7 | 48.4 | 98.5 | 81.8 | 91.4 | 42.9 | 98.5 | 72.2 | 97.4 | 59.1 | 98.5 |
| Normal weight | 90.6 | 83.0 | 94.2 | 74.5 | 86.3 | 84.0 | 94.2 | 67.0 | 94.1 | 82.2 | 94.1 | 82.2 |
| Overweight | 75.3 | 96.2 | 73.5 | 96.6 | 72.7 | 96.3 | 70.6 | 96.6 | 77.1 | 96.2 | 75.5 | 96.5 |
| Obesity | 75.0 | 99.4 | 89.2 | 98.2 | 80.0 | 99.3 | 88.9 | 98.6 | 70.8 | 99.4 | 89.5 | 98.0 |
Sn sensitivity, Sp specificity, PPV positive predictive value, NPV Negative predictive value
aWHO Growth Reference, 5–19 years (2007)