Tag: respiratory symptoms

Longitudinal Changes in Prevalence of Respiratory Symptoms Among Canadian Grain Elevator Workers: Recommendation

This study reported that respiratory symptoms consistent with bronchial responsiveness were significantly positively associated with cumulative dust exposure. A significant positive association was also reported between a physician’s diagnosis of bronchitis and dust exposure. Their study also showed a significant negative association between FEV1 and the ratio of FEV1/FVC and cumulative dust exposure. There is […]

Longitudinal Changes in Prevalence of Respiratory Symptoms Among Canadian Grain Elevator Workers: Discussion

Our results show that there is a positive association between long-term exposure to grain dust and increased prevalence of respiratory symptoms. Our findings suggest a dose-response relationship between years worked in the grain industry and the prevalence of chronic respiratory symptoms. Based on the ongoing intermediate cross-sectional analysis of these data, actions were taken from […]

Longitudinal Changes in Prevalence of Respiratory Symptoms Among Canadian Grain Elevator Workers: Goodness of Fit

Initially four multivariable marginal models were fitted using different within-subject covariance structures for each of the respiratory symptoms and the within-subject covariance structure that provided minimum SEs for most of the covariates was selected in order to fit the final model (shown in Appendix). The exchangeable within-subject covariance structure was selected for model building because […]