Table 5 Two-sample independent t test and Cohen’s d for comparison of perceived psychological and social factors at work as measured by QPS Nordic and ERI Questionnaire subscales, for the study population of patients on sick leave due to neck or back pain, and a reference population
Subscales | Study population | Reference population | Cohen’s d | t test | ||
|---|---|---|---|---|---|---|
p value | ||||||
QPS Nordic | Mean | SD | Mean | SD | ||
Job demands | n = 373 | n = 2015 | ||||
Quantitative demands | 3.14 | 0.82 | 3.26 | 0.77 | -0.15 | 0.006* |
Decision demands | 3.49 | 0.82 | 3.55 | 0.77 | -0.08 | 0.17 |
Learning demands | 2.47 | 0.68 | 2.63 | 0.71 | -0.23 | < 0.001* |
Job control | ||||||
Positive challenge at work | 3.89 | 0.88 | 3.94 | 0.83 | -0.06 | 0.29 |
Control of decision | 2.62 | 0.85 | 2.76 | 0.82 | -0.17 | 0.002* |
Control of work pacing | 2.57 | 1.14 | 2.81 | 1.18 | -0.21 | < 0.001* |
Job support | ||||||
Support from superior | 3.48 | 1.07 | 3.49 | 1.00 | -0.01 | 0.86 |
Support from coworkers | 3.66 | 1.03 | 3.88 | 0.89 | -0.23 | < 0.001* |
Support from friends | 3.92 | 0.99 | 3.91 | 0.92 | 0.01 | 0.85 |
Does your work require physical endurance? | 3.44 | 1.42 | 2.70 | 1.30 | 0.55 | < 0.001* |
ERI-Q | n = 1803 | SE | ||||
Mean effort | 12.82 | 4.53 | 11.7 | 4.2 | 0.26 | < 0.001* |
Mean reward | 45.39 | 8.97 | 47.8 | 6.5 | -0.31 | < 0.001* |
Mean overcommitment | 13.32 | 3.76 | 12.1 | 3.4 | 0.34 | < 0.001* |