Table 1 Characteristics of the worksites and employees at baseline (Nj = 23, Ni = 556)
Worksite-level variables (Nj = 23) | N (%) | Min–Max | Mean (SD) | Missing (%) | |||
Worksite size | Â | Â | Â | 0 (0.0) | |||
 10–49 | 12 (52.2) | – | – |  | |||
 50–99 | 6 (26.1) | – | – |  | |||
 100–299 | 3 (13.0) | – | – |  | |||
 ≥300 | 2 (8.7) | – | – |  | |||
Worksite location |  | – | – | 0 (0.0) | |||
 Urban | 14 (60.9) | – | – |  | |||
 Local/suburban | 9 (39.1) | – | – |  | |||
Workplace environment | Â | Â | Â | 0 (0.0) | |||
 Parking/Bike | – | 0.00–3.00 | 1.28 (1.0) |  | |||
 Signs/Bulletin boards/Advertisements | – | 0.00–4.00 | 1.15 (1.2) |  | |||
 Stairs/Elevator | – | 0.00–2.00 | 0.74 (0.6) |  | |||
 Physical activity/Fitness facilities | – | 0.00–7.00 | 0.74 (1.7) |  | |||
 Work rules |  | 3.00–6.00 | 5.04 (0.8) |  | |||
 Written policies | – | 0.00–6.00 | 0.26 (1.3) |  | |||
 Health promotion programs | – | 0.00–6.00 | 1.43 (1.9) |  |  | ||
Employee-level variables | Total (Ni = 556) | Follow-up completer (Ni = 454) | Drop-out (Ni = 102) | p for difference | |||
N (%) Mean (SD) [Min–Max] | Missing (%) | N (%) Mean (SD) [Min–Max] | Missing (%) | N (%) Mean (SD) [Min–Max] | Missing (%) | ||
Demographic variables | |||||||
 Gender |  | 4 (0.7) |  | 2 (0.4) |  | 2 (2.0) | 0.091 |
  Male | 263 (47.6) |  | 223 (49.3) |  | 40 (40.0) |  |  |
  Female | 289 (52.4) |  | 229 (50.7) |  | 60 (60.0) |  |  |
 Age | M=43.56 (11.1) [19–84] | 12 (2.2) | M=44.27 (11.1) [19–84] | 6 (1.3) | M=40.21 (10.2) [21–65] | 6 (5.9) | 0.001 |
 Employment Status |  | 3 (0.5) |  | 0 (0.0) |  | 3 (2.9) | 0.980 |
  Regular | 386 (69.8) |  | 317 (69.8) |  | 69 (69.7) |  |  |
  Non-regular (Part-time, contract, dispatched) | 167 (30.2) |  | 137 (30.2) |  | 30 (30.3) |  |  |
 Occupational status |  | 6 (1.1) |  | 3 (0.7) |  | 3 (2.9) | 0.926 |
  Clerical | 288 (52.4) |  | 236 (52.3) |  | 52 (52.5) |  |  |
  Managerial | 112 (20.4) |  | 94 (20.8) |  | 18 (18.2) |  |  |
  Technical and professional | 73 (13.1) |  | 59 (13.1) |  | 14 (14.1) |  |  |
  Others | 77 (14.0) |  | 62 (13.7) |  | 15 (15.2) |  |  |
 Working hours per week |  | 8 (1.4) |  | 3 (0.7) |  | 5 (4.9) | 0.850 |
  ≤40 hours | 208 (38.0) |  | 172 (38.1) |  | 36 (37.1) |  |  |
  ≥41 hours | 340 (62.0) |  | 279 (61.9) |  | 61 (62.9) |  |  |
Job stressors | |||||||
 Job strain (job demands by job control) | M=0.48 (0.1) [0.20–1.00] | 19 (3.4) | M=0.48 (0.1) [0.20–1.00] | 15 (3.3) | M=0.48 (0.1) [0.20–1.00] | 4 (3.9) | 0.849 |
Psychological determinants | |||||||
 Self-regulation for physical activity | M=24.66 (10.1) [12–57] | 9 (1.6) | M=24.56 (10.1) [12–57] | 4 (0.9) | M=25.09 (9.9) [12–50, 53, 54] | 5 (4.9) | 0.640 |
 Self-efficacy for physical activity | M=11.45 (3.6) [4–20] | 4 (0.7) | M=11.46 (3.6) [4-20] | 3 (0.7) | M=11.44 (3.8) [4–20] | 1 (1.0) | 0.954 |
Physical activity (METs-hours/week) | |||||||
 Occupational | M=3.21 (18.7) [0–304] | 5 (0.9) | M=3.42 (19.8) [0–304] | 4 (0.9) | M=2.31 (12.7) [0–124] | 1 (1.0) | 0.590 |
 Transport-related | M=10.98 (16.5) [0–144] | 6 (1.1) | M=10.72 (16.1) [0–144] | 5 (1.1) | M=12.12 (18.4) [0–140] | 1 (1.0) | 0.442 |
 Leisure-time | M=7.89 (14.6) [0–124] | 5 (0.9) | M=8.17 (14.3) [0–124] | 4 (0.9) | M=6.64 (15.8) [0–124] | 1 (1.0) | 0.344 |