Table 1. Description of the randomized study population of cleaners at baseline (N = 116), stratified by the intervention group.
| Randomized population (N = 116) | Aerobic exercise (n = 57) | Reference(n = 59) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | N | Mean | SD | n | Mean | SD | N | |
| Age (years) | 45.3 | 8.6 | 44.9 | 9.2 | 45.7 | 8.1 | |||
| Gender (% females) | 75.9 | 88 | 75.4 | 43 | 76.3 | 45 | |||
| Height (m) | 1.6 | 0.09 | 1.6 | 0.09 | 1.6 | 0.08 | |||
| Body weight (kg) | 70.7 | 14.1 | 69.7 | 12.7 | 71.7 | 15.4 | |||
| BMI (kg/m2) | 26.7 | 4.5 | 26.2 | 4.0 | 27.1 | 4.9 | |||
| Body fat (%) | 31.6 | 8.6 | 31.1 | 8.3 | 32.1 | 8.9 | |||
| Waist circumference (cm) | 87.6 | 11.1 | 86.7 | 11.0 | 88.4 | 11.2 | |||
| Job seniority (years) | 11.9 | 7.8 | 12.3 | 8.7 | 11.5 | 6.8 | |||
| Current smoker (%) | 24.1 | 28 | 22.8 | 13 | 25.4 | 15 | |||
| Ethnicity (% non western) | 62.1 | 72 | 70.2 | 40 | 54.2 | 32 | |||
| Daily use of antihypertension and/or heart medication (%) | 12.1 | 14 | 14.0 | 8 | 10.2 | 6 | |||
| Daily use of cholesterol and/or hormone medication (%) | 13.8 | 16 | 12.3 | 7 | 15.3 | 9 | |||
| Leisure time physical activity (% < 2 h/weeks light activity or light activity 2–4 h/weeks) | 72.4 | 84 | 78.9 | 45 | 66.1 | 39 | |||
| Physical activity at work (% having standing/walking work including lifts and strenuous physical work) | 60.3 | 70 | 63.2 | 36 | 57.6 | 34 | |||
| Resting systolic blood pressure (mmHg) | 122.7 | 21.7 | 125.2 | 25.1 | 120.3 | 17.5 | |||
| Resting diastolic blood pressure (mmHg) | 82.7 | 12.6 | 83.7 | 14.2 | 81.7 | 10.8 | |||
| Cardiorespiratory fitness (mlO2∙min-1∙kg-1) | 24.9 | 6.6 | 24.8 | 5.8 | 25.0 | 7.2 | |||
| Resting heart rate (beat/min) | 71.3 | 14.8 | 71.7 | 10.6 | 70.5 | 8.8 | |||
| Sleeping heart rate (beat/min) | 49.5 | 5.8 | 49.2 | 6.5 | 49.7 | 5.1 | |||
| Aerobic work load during work (% of HRR) | 30.9 | 7.2 | 30.1 | 6.7 | 31.7 | 7.5 | |||
| Ambulatory systolic blood pressure (mmHg) | 120.6 | 12.7 | 83 | 121.8 | 14.7 | 41 | 119.5 | 10.4 | 42 |
| Ambulatory diastolic blood pressure (mmHg) | 77.3 | 7.7 | 83 | 77.3 | 8.1 | 41 | 77.3 | 7.5 | 42 |
| hsCRP (μg/ml) | 1.47 | 1.72 | 1.39 | 1.30 | 1.53 | 2.05 | |||
| Fibrinogen (g/l) | 3.22 | 0.68 | 3.24 | 0.69 | 3.19 | 0.67 | |||
| HDL (mmol/L) | 1.53 | 0.39 | 1.53 | 0.36 | 1.53 | 0.41 | |||
| LDL (mmol/L) | 3.32 | 1.00 | 3.50 | 0.98 | 3.16 | 1.00 | |||
| TC (mmol/L) | 5.66 | 1.25 | 5.82 | 1.25 | 5.50 | 1.24 | |||
| TG (mmol/L) | 1.45 | 0.77 | 1.48 | 0.82 | 1.42 | 0.71 | |||
| HbA1c (%) | 5.24 | 0.65 | 5.29 | 0.77 | 5.20 | 0.51 | |||
Note: Mean ± standard deviations or percent (n) are reported. [SD = standard deviation; HRR = heart rate reserve]. Differences between aerobic exercise and reference groups were analyzed with student’s t-test for continuous variables, and with Chi2 test for categorical variables.