Table 4

 Mutually adjusted relative risk (RR) of work injury among 15 365 paid employees

RR (95% CI)
ESS, Epworth Sleepiness Score.
SexMale v female1.29 (1.09–1.53)
EducationPrimary/high/secondary1
Polytechnic or similar1.07 (0.90–1.27)
University0.78 (0.63–0.97)
Usual work patternDaytime, no shifts1
Irregular/other1.17 (0.95–1.43)
Rotating, no nights1.75 (1.17–2.61)
Permanent nights1.38 (0.95–2.00)
Rotating, with nights1.89 (1.49–2.41)
Hours workedMore than 40 h v 40 h or less1.32 (1.12–1.55)
SmokingCurrent smoker v not1.46 (1.21–1.75)
Daytime sleepinessESS >10 v ⩽101.34 (1.07–1.67)
Sleep difficultiesNone1
1–4 monthly1.26 (0.99–1.60)
5 or more monthly1.67 (1.28–2.18)
Headaches decrease activitiesYes v no1.60 (1.34–1.90)
BMI15–241
25–291.28 (1.07–1.52)
30+1.49 (1.22–1.82)
Occupation (Appendix 2)Legislator/administrator/manager1
Professional1.29 (0.93–1.80)
Associate professional/technician1.29 (0.93–1.80)
Clerk1.22 (0.85–1.75)
Service/sales2.28 (1.63–3.18)
Agriculture/trades/machine/elementary4.04 (2.98–5.47)