Table 2.
Demographic characteristics of the male and female workers stratified on %HRR.
| Variables | Male | Female | ||
|---|---|---|---|---|
| Low %HRR (n = 39) | High %HRR (n = 35) | Low %HRR (n = 33) | High %HRR (n = 20) | |
| Age in years (M, SD) | 42.3 (9.1) | 40.1 (10.7) | 45.5 (8.4) | 46.0 (7.6) |
| Seniority in months (M, SD) | 151.9 (132.8) | 114.8 (111.6) | 182.1 (139.7) | 75.8 (50.4) |
| BMI in kg/m2 (M, SD) | 25.4 (3.0) | 25.8 (3.5) | 24.4 (5.1) | 28.0 (6.3) |
| Current smokers (%) | 47.2 | 44.1 | 40.6 | 70.6 |
| Work ability (M, SD) | 8.0 (0.8) | 7.7(1.1) | 7.8 (1.1) | 8.3 (0.7) |
| Aerobic capacity in mL/kg/min (M, SD) | 37 (9) | 32 (7) | 30 (6) | 27 (8) |
| Influence at work (M, SD) | 41.0 ( 20.5) | 39.5 (20.1) | 45.6 (27.9) | 34.7 (22.3) |
Note: Low HRR ≤ 33%, high HRR > 33%; BMI = body mass index; HRR = heart rate reserve; M= mean; n = number of workers; SD = standard deviation; According to the recommendation of the STROBE statement [39], no significance test to discriminate between low and high HRR groups was performed.