Longitudinal analysis of respiratory symptoms in population studies with a focus on dyspnea in marine transportation workers.

@article{Arrandale2009LongitudinalAO,
  title={Longitudinal analysis of respiratory symptoms in population studies with a focus on dyspnea in marine transportation workers.},
  author={Victoria Arrandale and Mieke Koehoorn and Ying C. MacNab and Susan M. Kennedy},
  journal={International archives of occupational and environmental health},
  year={2009},
  volume={82 9},
  pages={1097-105}
}
PURPOSE Longitudinal respiratory symptoms are rarely studied in occupational epidemiology. We investigated dyspnea change over time and predictors of change over time using two longitudinal modeling techniques, a semi-parametric group-based approach (SAS® Proc Traj) and a generalized linear mixed model (SAS® Proc Glimmix), and compared the two techniques for use in longitudinal studies of respiratory symptoms. METHODS Data were previously collected from a lung health surveillance study of… CONTINUE READING

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