TABLE 1.
Baseline characteristics of study participants
| Characteristics |
Overall Mean (SD) or median (IQR) or n (%) |
High CRF Mean (SD) or median (IQR) or n (%) |
Low CRF Mean (SD) or median (IQR) or n (%) |
p‐value |
|---|---|---|---|---|
| Socio‐economic status | 8.26 (4.24) | 7.54 (4.30) | 8.98 (4.04) | <.001 |
| Cardiorespiratory fitness (ml/kg/min) | 30.8 (7.9) | 36.9 (5.3) | 24.6 (4.5) | <.001 |
| Questionnaire/Prevalent conditions | ||||
| Age (years) | 52 (5) | 51 (5) | 54 (4) | <.001 |
| History of type 2 diabetes | 58 (3.2) | 13 (1.4) | 45 (4.9) | <.01 |
| Current smoking | 591 (32.3) | 248 (27.1) | 343 (37.5) | <.01 |
| History of CHD | 379 (20.7) | 95 (10.4) | 284 (31.0) | <.01 |
| Physical measurements | ||||
| BMI (kg/m2) | 26.8 (3.5) | 25.8 (2.8) | 27.9 (3.7) | <.001 |
| SBP (mmHg) | 134 (16) | 132 (15) | 136 (18) | <.001 |
| DBP (mmHg) | 89 (10) | 88 (10) | 90 (11) | <.001 |
| Heart rate (bpm) | 62 (11) | 61 (10) | 64 (11) | <.001 |
| Total PA (kj/day) | 1171 (633–1963) | 1260 (685–2023) | 1071 (569–1888) | .011 |
| Blood biomarkers | ||||
| Total cholesterol (mmol/l) | 5.91 (1.08) | 5.83 (1.08) | 5.99 (1.07) | .001 |
| HDL‐C (mmol/l) | 1.29 (0.30) | 1.34 (0.30) | 1.23 (0.28) | <.001 |
| Fasting plasma glucose (mmol/l) | 5.31 (1.14) | 5.13 (0.78) | 5.48 (1.39) | <.001 |
Abbreviations: BMI, body mass index; CHD, coronary heart disease; CRF, cardiorespiratory fitness; DBP, diastolic blood pressure; HDL‐C, high‐density lipoprotein cholesterol; IQR, interquartile range; PA, physical activity; SBP, systolic blood pressure; SD, standard deviation.