Table 5. Prevalence and exact agreement of obesity defined by BMI and BF%.
Obesity: BMI ≥ 30.0; measured BF% ≥ 25.0. Ck, Cohen’s kappa coefficient.
| Measured BF% | |||||||
|---|---|---|---|---|---|---|---|
| Age group | n | BMI | Not obese | Obese | Total | Ck | Percent agreement |
| 20–39 y | 297 | Not obese | 32.3 | 36.7 | 69.0 | ||
| Obese | 1.0 | 30.0 | 31.0 | ||||
| Total | 33.3 | 66.7 | 100.0 | 0.33 a | 62.3 | ||
| 40–59 y | 88 | Not obese | 18.2 | 30.7 | 48.9 | ||
| Obese | 1.1 | 50.0 | 51.1 | ||||
| Total | 19.3 | 80.7 | 100.0 | 0.36 a | 68.2 | ||
| ≥ 60 y | 71 | Not obese | 5.6 | 52.1 | 57.7 | ||
| Obese | 0.0 | 42.3 | 42.3 | ||||
| Total | 5.6 | 94.4 | 100.0 | 0.08 | 47.9 | ||
| Total | 456 | Not obese | 25.4 | 37.9 | 63.4 | ||
| Obese | 0.9 | 35.7 | 36.6 | ||||
| Total | 26.3 | 73.7 | 100.0 | 0.31 a | 61.2 | ||
aAgreement between measured BF% and BMI significant, P < 0.001.