Table 1. Baseline characteristics of Japanese males in 1986 according to body fat percentage and body mass index (quartiles).
| Characteristic | All men | Q1 (lowest) | Q2 | Q3 | Q4 (highest) |
|---|---|---|---|---|---|
| Body fat percentage (%) | ≤12 | 13–14 | 15–17 | ≥18 | |
| n | 1,152 | 335 | 282 | 295 | 240 |
| Age (yrs) | 28.0 ± 4.6 | 27.6 ± 4.8 | 27.9 ± 4.7 | 28.3 ± 4.5 | 28.2 ± 4.5 |
| Body mass index (kg/m2) | 22.6 ± 2.7 | 20.8 ± 1.9 | 22.1 ± 2.0 | 23.1 ± 1.9 | 25.2 ± 3.0 |
| VO2max (ml/kg/min) | 43.2 ± 8.9 | 46.5 ± 8.8 | 43.9 ± 8.2 | 42.2 ± 8.5 | 38.7 ± 8.3 |
| Current drinkers (%) | 64.1 | 60.0 | 61.0 | 67.5 | 69.6 |
| Current smokers (%) | 63.4 | 71.0 | 61.0 | 57.3 | 62.9 |
| Body mass index (kg/m2) | ≤20.82 | 20.83–22.31 | 22.32–24.05 | ≥24.06 | |
| n | 1,152 | 285 | 290 | 289 | 288 |
| Age (yrs) | 28.0 ± 4.6 | 27.1 ± 5.0 | 27.4 ± 4.4 | 28.7 ± 4.5 | 28.7 ± 4.4 |
| Body fat percentage (%) | 14.7 ± 3.5 | 12.3 ± 2.4 | 13.8 ± 2.5 | 15.2 ± 3.0 | 17.6 ± 3.7 |
| VO2max (ml/kg/min) | 43.2 ± 8.9 | 46.5 ± 9.0 | 44.7 ± 8.6 | 43.3 ± 8.3 | 38.2 ± 7.6 |
| Current drinkers (%) | 64.1 | 59.3 | 59.0 | 69.6 | 68.8 |
| Current smokers (%) | 63.4 | 65.6 | 59.3 | 64.0 | 64.6 |
Data are means ± standard deviation or %
VO2max: maximal oxygen uptake