作者: Victoria H. Arrandale , Mieke Koehoorn , Ying MacNab , Susan M. Kennedy
DOI: 10.1007/S00420-009-0412-Y
关键词:
摘要: Purpose Longitudinal respiratory symptoms are rarely studied in occupational epidemiology. We investigated dyspnea change over time and predictors of using two longitudinal modeling techniques, a semi-parametric group-based approach (SAS® Proc Traj) generalized linear mixed model Glimmix), compared the techniques for use studies symptoms.