Table 3 Crude, semi-adjusted, and fully adjusted models for night shift exposure and sickness absence outcomes
From: Cumulative exposure to shift work and sickness absence: associations in a five-year historic cohort
Crude model | Semi-adjusted model | Fully adjusted model | ||
|---|---|---|---|---|
Long-term sickness absence (>7 days) | OR (95% CI) | OR (95% CI) | OR (95% CI) | |
Number of night shifts 2005–2008 | No night shifts | Reference | Reference | Reference |
Night shifts (1 to ≤46) | 1.36 (1.20–1.53) | 1.30 (1.12–1.50) | 1.15 (0.99–1.34) | |
Night shifts (47 ≤ 110) | 1.54 (1.36–1.74) | 1.17 (1.01–1.34) | 1.01 (0.87–1.17) | |
Night shifts (>110) | 1.08 (0.95–1.22) | 1.06 (0.92–1.21) | 1.05 (0.91–1.21) | |
Sickness absence days 2005–2008 | ≥0 to <26 days | Reference | Reference | |
≥26 to <67 days | 3.08 (2.60–3.65) | 2.99 (2.52–3.55) | ||
≥67 to <140 days | 8.11 (6.81–9.66) | 7.42 (6.21–8.86) | ||
≥140 days | 12.56 (10.50–15.02) | 11.23 (9.36–13.48) | ||
Special operational requirements | 1.00 (0.98–1.02) | |||
Knowledge requirements | 0.98 (0.97–0.98) | |||
Aggravated working conditions | ≤4 | Reference | ||
>4 to ≤11 | 1.16 (0.97–1.39) | |||
>11 to ≤15 | 1.18 (0.96–1.45) | |||
>15 | 1.26 (0.98–1.61) | |||
Sickness absence episodes | IRR (95% CI) | IRR (95% CI) | IRR (95% CI) | |
Number of night shifts 2005–2008 | No night shifts | Reference | Reference | Reference |
Night shifts (1 to ≤46) | 1.03 (0.97–1.08) | 0.93 (0.88–0.98) | 0.97 (0.91–1.02) | |
Night shifts (47 ≤ 110) | 0.99 (0.94–1.04) | 0.87 (0.83–0.92) | 0.91 (0.86–0.96) | |
Night shifts (>110) | 0.94 (0.89–0.99) | 0.95 (0.90–1.00) | 0.93 (0.88–0.98) | |
Sickness absence days 2005–2008 | ≥0 to <26 days | Reference | Reference | |
≥26 to <67 days | 2.19 (2.05–2.34) | 2.21 (2.06–2.35) | ||
≥67 to <140 days | 3.16 (2.95–3.38) | 3.20 (2.99–3.43) | ||
≥140 days | 3.49 (3.27–3.73) | 3.56 (3.32–3.81) | ||
Special operational requirements | 1.01 (1.00–1.02) | |||
Knowledge requirements | 1.00 (0.99–1.00) | |||
Aggravated working conditions | ≤4 | Reference | ||
>4 to ≤11 | 1.03 (0.96–1.11) | |||
>11 to ≤15 | 1.04 (0.96–1.13) | |||
>15 | 0.87 (0.79–0.96) | |||