Table 2. Skeletal muscle to body fat ratio (MFR) by sex, age and body mass index (BMI).
Age | MFR for normal BMI (BMI < 85th percentile for age and sex) | MFR for overweight and obesity (BMI ≥ 85th percentile for age and sex) | P value |
---|---|---|---|
Boys | |||
10 yr | 1.36 ± 0.44 | 0.68 ± 0.13 | < 0.001 |
11 yr | 1.30 ± 0.51 | 0.71 ± 0.16 | < 0.001 |
12 yr | 1.57 ± 0.67 | 0.77 ± 0.18 | < 0.001 |
13 yr | 1.80 ± 0.68 | 0.92 ± 0.18 | < 0.001 |
14 yr | 2.08 ± 0.92 | 1.05 ± 0.38 | < 0.001 |
15 yr | 2.27 ± 0.77 | 0.99 ± 0.18 | < 0.001 |
16 yr | 2.21 ± 0.77 | 1.03 ± 0.21 | < 0.001 |
17 yr | 2.02 ± 0.73 | 1.19 ± 0.34 | < 0.001 |
18 yr | 1.99 ± 0.69 | 1.19 ± 0.28 | < 0.001 |
total | 1.88 ± 0.78 | 0.94 ± 0.30 | < 0.001 |
Girls | |||
10 yr | 1.02 ± 0.27 | 0.70 ± 0.10 | < 0.001 |
11 yr | 1.09 ± 0.31 | 0.71 ± 0.12 | < 0.001 |
12 yr | 1.13 ± 0.34 | 0.79 ± 0.14 | < 0.001 |
13 yr | 1.04 ± 0.30 | 0.69 ± 0.14 | < 0.001 |
14 yr | 0.90 ± 0.20 | 0.68 ± 0.16 | < 0.001 |
15 yr | 0.89 ± 0.19 | 0.66 ± 0.14 | < 0.001 |
16 yr | 0.88 ± 0.17 | 0.65 ± 0.13 | < 0.001 |
17 yr | 0.85 ± 0.17 | 0.64 ± 0.17 | < 0.001 |
18 yr | 0.92 ± 0.20 | 0.54 ± 0.12 | < 0.001 |
total | 0.96 ± 0.26 | 0.68 ± 0.15 | < 0.001 |
Note- Data are means ± standard deviations.