Table 1. Baseline characteristics according to cardiorespiratory fitness category (n = 7,804).
| Overall | Cardiorespiratory fitness category | |||||||||
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | |||||||
| (n = 7,804) | (n = 2,157) | (n = 1,972) | (n = 1,871) | (n = 1,804) | ||||||
| , mL/kg/min | 39.1 | (8.5) | 30.6 | (4.2) | 36.4 | (3.5) | 41.5 | (4.2) | 49.8 | (6.8) |
| Age, years | 38 | (10) | 38 | (10) | 39 | (10) | 37 | (9) | 37 | (10) |
| Height, cm | 168.6 | (5.7) | 169.1 | (5.8) | 168.7 | (5.7) | 168.3 | (5.5) | 168.1 | (5.7) |
| Weight, kg | 65.9 | (8.4) | 69.4 | (9.1) | 66.5 | (8.1) | 64.3 | (7.5) | 62.7 | (6.9) |
| Body mass index, kg/m2 | 23.2 | (2.6) | 24.2 | (2.8) | 23.4 | (2.5) | 22.7 | (2.4) | 22.2 | (2.1) |
| Systolic blood pressure, mm Hg | 128.8 | (13.3) | 132.7 | (13.1) | 129.7 | (12.6) | 127.0 | (13.0) | 124.9 | (13.0) |
| Diastolic blood pressure, mm Hg | 74.2 | (9.0) | 77.0 | (9.1) | 75.0 | (8.6) | 72.7 | (8.7) | 71.4 | (8.6) |
| Smokers, % | 62.6 | 67.0 | 62.9 | 61.5 | 58.3 | |||||
| Drinkers, % | 71.1 | 70.4 | 70.2 | 72.2 | 71.8 | |||||
| Family history of diabetes, % | 30.1 | 31.6 | 30.2 | 29.3 | 29.1 | |||||
Data are expressed as mean (standard deviation) or %.