Adjusted odds (95% CI) of having a critical FEV1 predicted percentage (<80%) by current shift work exposure (n=89 157)
| Current work schedule | ||||
| Day workers | Shift work, but never or rarely night shifts | Irregular shift work including nights | Permanent night shift work | |
| Total cases (% of total sample size) | 9381 (12.73%) | 1183 (15.84%) | 849 (15.07%) | 397 (16.99%) |
| Total sample size | 73 719 | 7469 | 5632 | 2337 |
| Model 1: Age- and sex-adjusted OR (95% CI) | 1 (referent) | 1.31 (1.23 to 1.40) | 1.27 (1.18 to 1.37) | 1.44 (1.29 to 1.61) |
| Model 2: Multivariable adjusted OR (95% CI) | 1 (referent) | 1.19 (1.08 to 1.32) | 1.08 (0.96 to 1.21) | 1.20 (1.03 to 1.41) |
| Model 3: Model 2 covariates+sleep duration OR (95% CI) | 1 (referent) | 1.19 (1.08 to 1.32) | 1.08 (0.97 to 1.21) | 1.21 (1.04 to 1.42) |
The predicted FEV1 was estimated based on height and age. Model 2 covariates: age, sex, smoking status, smoking pack-years, alcohol status, daily alcohol intake, ethnicity, Townsend Deprivation Index, days exercised (walked, moderate and vigorous), body mass index, chronotype, length of working week, job asthma risk and job medical required. Model 3 data are adjusted for Model 2 covariates plus sleep duration.
FEV1, forced expiratory volume in 1 s.