Hi all,
May I seek the groups input on this ?
Im interested in the relationship between flu-vaccination status and sick leave rate in hospital staff. I have the following variables for each person: Year to be considered (1998-2003), Vaccination status (Y/N), Sick leave rate (continuous but skewed), Job category (eg Clinincal contact or not). My thoughts are to make all the variables categorical (eg sick leave rate would become high/low) and use a logistic regression with categorigal sick leave level as the outcome variable and vaccination status and job category as predictors. What worries me is the year, because of the issue of within subject variation. (Ive tried to imagine what happens in this case but my head started to spin). Also it seems a shame to lose all that info on the variation in sick leave rate by categorising it (but I guess if I want to use an ordinary regerssion I'll have to use dummy variables and transformations, and assume linearity). The more I write this the more worried I'm becoming. Is there some neat way to do this?
Thanks
Andrew
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