Table 1.
Baseline characteristics of the study group
| All subjects (N = 64) | Women (n = 12) | Men (n = 52) | |
|---|---|---|---|
| Age (years) | 37 ± 10 (18, 54) | 33 ± 8 (20, 45) | 38 ± 10 (18, 54) |
| Ethnicity (n) | |||
| Black | 14 | 5 | 9 |
| White | 19 | 4 | 15 |
| Hispanic | 11 | 1 | 10 |
| Native American | 20 | 2 | 18 |
| Body weight (kg) | 78.5 ± 12.2 (47.5, 107.8) | 74.4 ± 16.8 (47.5, 107.8) | 79 ± 11 (56, 105) |
| BMI (kg/m2) | 26.2 ± 3.9 (17.8, 39.1) | 26.9 ± 5.8 (17.8, 39.1) | 26 ± 3 (18, 37) |
| Body fat (%) | 27.6 ± 10.0 (6.9, 53.8) | 40.4 ± 8.4 (24.2, 53.8) | 25 ± 8 (6.9, 38)* |
| FM (kg) | 22.1 ± 10.0 (4.9, 56.9) | 31.2 ± 13.0 (13.6, 56.9) | 20 ± 8 (4.9, 36)* |
| FFM (kg) | 56.4 ± 9.3 (33.9, 79.4) | 43.2 ± 4.9 (33.9, 50.9) | 59 ± 7 (47, 79.4)* |
| 24-h EE (kcal/day) | 2,038 ± 283 (1,502, 2,810) | 1,802 ± 223 (1,502, 2,290) | 2,094 ± 268 (1,573, 2,810)* |
| 24-h RQ (ratio) | 0.87 ± 0.03 (0.80, 0.93) | 0.86 ± 0.03 (0.81, 0.91) | 0.87 ± 0.03 (0.80, 0.93) |
| Fasting glucose (mg/dL) | 92.0 ± 5.07 (80.0, 99.0) | 91.0 ± 3.3 (86.5, 97.0) | 92.3 ± 5.4 (80, 99) |
| 2-h OGTT glucose (mg/dL) | 103.8 ± 19.9 (65, 138) | 104.2 ± 16.5 (80, 130) | 103.7 ± 20.8 (65, 138) |
| Fasting plasma FGF21 (pg/mL) | 128.8 (105.8–156.9) [13.0, 492.9] | 119.0 (70.6–200.5) [22.4, 288.2] | 131.2 (105.4–163.4) [13.0, 492.9] |
Unless otherwise stated, data are presented as mean ± SD (minimum, maximum), except for FGF21 where values are presented as geometric mean with its 95% CI [minimum, maximum]. Fasting plasma FGF21 concentration was calculated as the average of all prediet fasting measurements. FFM, fat free mass; FM, fat mass.
*P < 0.05 vs. women, calculated by Student t test.