Table 2.
Classification of obesity using BMI >30kg/m2 and varying percent body fat cut-points to define obesity (N=2726)
| 35% Body Fat | 38% Body Fat | 40% Body Fat | |
|---|---|---|---|
| Prevalence of BMI >30kg/m2 | 66% | 45% | 32% |
| Sensitivity (95%CI) | 32.4% (29.5, 35.3) | 44.6% (40.9, 48.2) | 55.2% (50.9 59.3) |
| Specificity (95%CI) | 99.3% (98.6, 99.8) | 97.1 (96.0, 98.1) | 94.6% (93.2 95.9) |
| Positive predictive value (95%CI) | 98.8% (97.8, 99.8) | 92.5% (89.8, 95.1) | 82.9% (79.0 86.8) |
| Negative predictive value (95%CI) | 43.6 % (40.7, 46.4) | 68.5% (65.9, 71.0) | 81.5% (79.4, 83.6) |
| Percent correctly classified | 55.4% | 73.7% | 81.8% |
| Area under ROC curve | 0.658 | 0.708 | 0.749 |
Note: Details of calculation of sensitivity, specificity, positive predictive value, negative predictive value, and percent correctly classified are provided in the Supplemental Digital Content.