Questionnaire items, mean±SD | Night shift workers | Day shift workers | P value, t-test |
Level of job satisfaction | 3.48 (SD=1.04) | 3.82 (SD=0.93) | p=0.007, 2.578 |
Level of safety performance | 3.59 (SD=1.2) | 3.63 (SD=1.07) | p<0.761, 0.286 |
Adverse effect of working hours on social life | 3.95 (SD=1.11) | 3.61 (SD=1.25) | p<0.030, –2.337 |
Adverse effect of working hours on family life | 3.92 (SD=1.10) | 3.50 (SD=1.21) | p<0.006, –2.925 |