So based on simple descriptives, the notion that TLF is associated with a longer work duration appears to be supported by the data.
Similarly, an increase in work duration was correlated with an increase in complaints of MSDs in different parts of the body.
When the non-shift work group was used as a reference, Tertile 3 of shift work duration had a significantly increased risk for overweight/obesity (OR, 1.24; 95% CI, 1.07-1.43) and obesity (OR, 1.32; 95% CI, 1.08-1.62) afullyfully adjusting for covariates, including age [see Additional file 2].
Our results were consistent with those obtained in earlier studies; multiple logistic regression revealed that Tertile 3 of shift work duration had a significantly increased risk for overweight/obesity (OR, 1.24; 95% CI, 1.07-1.43) and obesity (OR, 1.32; 95% CI, 1.08-1.62) compared with non-shift work group.
We also cited examples where adjustment for work duration was used as a method to address bias due to a healthy worker survivor effect.
There was a significant positive association between obesity and shift work duration in the unadjusted analysis; however, it was attenuated and no longer significant in the multivariate model.
Data from a large study of US residents found that extended work duration and night work among interns is associated with increased risk of percutaneous injuries [ 19].
Having been vaccinated against Hepatitis B, trained on biosafety, availed to safety mechanisms and work duration were not associated with history of a hazard.
This paper presents a joint trivariate discrete continuous continuous model for commuters' mode choice, work start time and work duration.
Telecommunication based contact was mainly associated with work duration, degree of urbanization and distance.
Several ergonomic studies have estimated computer work duration using registration software.
