Table 2.
Body fat percentage by BAI and BIA according to different levels of adiposity and weight status by gender.
| Characteristics | Female | Male | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | BF%BAI | BF%BIA | p-Value | Difference between Measures (CI 95%) | R2 | n | BF%BAI | BF%BIA | p-Value | Difference between Measures (CI 95%) | R2 | |
| All | 469 | 30.0 (5.4) | 26.8 (7.2) | 0.001 | −3.1 (−3.7 to −2.6) | 0.280 | 434 | 24.8 (5.5) | 16.0 (6.7) | 0.001 | −8.7 (−9.3 to −8.1) | 0.212 |
| Level of adiposity (%) * | ||||||||||||
| ≤20 | 87 | 26.5 (2.9) | 16.2 (3.1) | 0.001 | −10.3 (−11.1 to −9.4) | 0.041 | 332 | 23.8 (3.9) | 13.1 (4.1) | 0.001 | −10.7 (−11.1 to −10.2) | 0.283 |
| 20–30 | 235 | 29.1 (5.7) | 25.6 (2.8) | 0.001 | −3.4 (−4.1 to −2.6) | 0.046 | 88 | 27.7 (6.4) | 24.0 (2.5) | 0.001 | −3.5 (−5.1 to −2.3) | 0.024 |
| 31–40 | 127 | 32.9 (3.5) | 33.8 (2.6) | 0.002 | 0.9 (0.3 to −1.4) | 0.241 | 14 | 27.5 (14.2) | 33.3 (2.4) | 0.196 | 5.7 (−3.3 to −14.9) | 0.081 |
| ≥40 | 20 | 36.7 (2.9) | 42.1 (1.6) | 0.001 | 5.4 (4.0 to 6.8) | 0.114 | – | – | – | – | – | – |
| Weight status | ||||||||||||
| BMI < 25 (kg/m2) | 348 | 28.5 (4.9) | 24.5 (5.1) | 0.001 | −4.0 (−4.6 to −3.3) | 0.051 | 307 | 23.4 (4.4) | 13.3 (4.4) | 0.001 | −10.0 (−10.6 to −9.4) | 0.087 |
| 25 ≤ BMI < 30 (kg/m2) | 94 | 34.0 (2.4) | 33.4 (3.7) | 0.001 | −5.5 (−1.5 to −0.4) | 0.014 | 104 | 27.4 (5.9) | 21.7 (4.1) | 0.001 | −5.6 (−7.1 to −4.1) | 0.018 |
| 30 ≤ BMI < 35 (kg/m2) | 27 | 37.9 (2.9) | 40.4 (3.2) | 0.001 | −2.4 (0.8 to 4.1) | 0.003 | 23 | 32.2 (4.3) | 29.1 (6.7) | 0.009 | −3.1 (−5.5 to −0.8) | 0.365 |
Data are expressed as mean (SD). * Levels of adiposity (20–30; 31–40 and ≥40 BF%) were classified according to the National Health and Nutrition Examination Survey (NHANES) (1999–2004) by BIA in Spanish population [21]. CI = confidence interval.