Table 1.
Outcome and demographical characteristics at baseline of the workers in the intervention and control group.
| Variables | Intervention group N = 203 | Control group N = 124 | ||||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | N | % | Mean | SD | N | % | |
| Age (years)* | 39, 4* | 12, 5 | 44, 2 | 12, 9 | ||||
| Male | 162 | 79, 4 | 104 | 83, 9 | ||||
|
Education Elementary school (9 years) Upper elementary school (> 9years) University/college Other |
7 95 94 7 |
3, 4 46, 8 46, 3 3, 4 |
10 66 44 4 |
8, 2 54, 1 34, 4 3, 3 |
||||
|
Function among professionals First line manager Site manager Project manager Project or production engineer |
54 31 21 34 |
26, 6 15, 3 10, 3 16, 7 |
20 21 17 16 |
16, 1 16.9 13, 7 12, 9 |
||||
| Trade workers | 62 | 30, 4 | 50 | 40,3 | ||||
| Professionals | 141 | 69, 6 | 74 | 59,7 | ||||
|
Job seniority* < 2 2–5 >5 |
34* 66 102 |
16, 8 32, 7 50, 5 |
14 17 91 |
11, 5 13, 9 74, 6 |
||||
|
Role seniority < 2 2–5 >5 |
14 39 147 |
7 19, 5 73, 5 |
9 13 97 |
7, 6 10, 9 81, 5 |
||||
| Stress (0–100)* | 34, 6* | 18, 2 | 29, 3 | 18, 25 | ||||
| Quantitative demands (0–100)* | 43, 1* | 20, 4 | 36, 7 | 17, 6 | ||||
| Role clarity (0–100) | 74, 9 | 16, 1 | 73, 7 | 17, 3 | ||||
| Planning (1–3) | 2, 4 | 0, 6 | 2, 4 | 0, 6 | ||||
| Staffing (1–25) | 14, 7 | 5, 6 | 15, 3 | 5, 7 | ||||
| Team effectiveness (1–5) | 3, 9 | 0, 6 | 3, 8 | 0, 75 | ||||
| Psychosocial safety climate (1–5)* | 3, 5* | 0, 8 | 3, 1 | 0, 8 | ||||
We used independent t-tests for continuous variables and Pearson's chi-square test for categorical variables to compare the baseline characteristics between groups. SD = standard deviation.
*
p < 0.05.