Table 3.
Subject characteristics for follow-up analyses.
| Variables | Females |
Males |
P value for sex difference | P value for sex interaction | ||||
|---|---|---|---|---|---|---|---|---|
| Baseline | Follow up | Δ (P value) | Baseline | Follow up | Δ (P value) | |||
| Study 1: delta VO2max vs. delta body composition | ||||||||
| N (number) | 55 | 80 | ||||||
| Race (number) | Full heritage American Indians of southwestern heritage = 55 | Full heritage American Indians of southwestern heritage = 77, other Indians = 3 | > 0.1 | |||||
| Age (years) | 25.7 ± 5.7 | 29.7 ± 6.3 | 4.0 ± 2.3 | 25.9 ± 5.7 | 30.7 ± 5.6 | 4.8 ± 2.2 | 0.043 | 0.094 |
| Body mass index (kg/m2) | 36.60 ± 6.52 | 38.24 ± 7.08 | 1.64 ± 3.35 (< 0.001) | 33.81 ± 8.30 | 36.35 ± 9.50 | 2.54 ± 4.17 (< 0.0001) | > 0.6 | > 0.4 |
| Body weight (kg) | 92.9 ± 18.6 | 97.1 ± 20.0 | 4.2 ± 8.4 (< 0.001) | 99.0 ± 27.2 | 106.4 ± 31.5 | 7.4 ± 12.7 (< 0.0001) | > 0.5 | > 0.3 |
| Fat free mass (kg) | 55.1 ± 8.6 | 57.0 ± 8.9 | 1.9 ± 3.9 (< 0.001) | 68.5 ± 12.5 | 72.0 ± 13.8 | 3.5 ± 6.1 (< 0.0001) | > 0.6 | > 0.4 |
| Fat mass (kg) | 37.8 ± 11.6 | 40.0 ± 12.0 | 2.3 ± 6.8 (= 0.016) | 30.5 ± 16.0 | 34.6 ± 18.5 | 4.1 ± 8.7 (< 0.001) | > 0.3 | > 0.1 |
| % fat mass (%) | 39.9 ± 5.9 | 40.5 ± 4.6 | 0.7 ± 4.3 (> 0.2) | 28.7 ± 9.0 | 30.5 ± 7.8 | 1.8 ± 5.2 (< 0.01) | 0.030 | > 0.1 |
| VO2max (mL/min) | 2280.9 ± 357.1 | 2332.2 ± 443.0 | 51.3 ± 338.7 (> 0.2) | 3421.4 ± 525.4 | 3462.6 ± 696.3 | 41.2 ± 562.2 (> 0.5) | > 0.6 | > 0.9 |
| Study 2: VO2max vs. weight change | ||||||||
| N (number) | 97 | 120 | ||||||
| Race (number) | Full heritage American Indians of southwestern heritage = 97 | Full heritage American Indians of southwestern heritage = 114, other Indians = 6 | 0.026 | |||||
| Age (years) | 25.1 ± 5.5 | 36.4 ± 8.1 | 11.3 ± 6.8 | 26.2 ± 5.9 | 37.3 ± 7.9 | 11.1 ± 6.9 | > 0.5 | > 0.5 |
| Body mass index (kg/m2) | 35.17 ± 7.49 | 39.75 ± 8.59 | 4.58 ± 5.32 (< 0.0001) | 32.69 ± 8.19 | 36.79 ± 10.44 | 4.10 ± 5.28 (< 0.0001) | 0.028 | 0.033 |
| Body weight (kg) | 89.2 ± 20.4 | 101.5 ± 22.9 | 12.3 ± 13.6 (< 0.0001) | 95.6 ± 26.4 | 108.1 ± 33.3 | 12.5 ± 15.9 (< 0.0001) | 0.025 | 0.021 |
The differences between baseline and follow up were analyzed by pared t-test. A probability of sex difference in the frequency of Full heritage American Indians of southwestern heritage was analyzed by Chi-Square test. A probability of sex difference or sex interaction was analyzed by general linear model.