From: Long working hours and metabolic syndrome among Japanese men: a cross-sectional study
 | Model 1 a | Model 2 b | Model 3 c | |||
---|---|---|---|---|---|---|
 | (n = 933) | (n = 933) | (n = 911) | |||
Working hours | OR | (95% CI) | OR | (95% CI) | OR | (95% CI) |
≥7 to 8 hours/day | 1.00 | Reference | 1.00 | Reference | 1.00 | Reference |
>8 to 9 hours/day | 1.58 | (0.94–2.68) | 1.56 | (0.92–2.66) | 1.66 | (0.91–3.01) |
>9 to 10 hours/day | 1.17 | (0.68–2.02) | 1.31 | (0.75–2.28) | 1.48 | (0.75–2.90) |
>10 hours/day | 1.19 | (0.67–2.10) | 1.47 | (0.82–2.63) | 2.32 | (1.04–5.16) |