I have 150 (daily) repeated measurements (scores) of 68 individuals where
each score corresponds to the severity of the symptoms (0=no symptoms to
5=severe symptoms, continuous variable). For all these days I have recorded
the pollutants' load in the atmosphere (continuous variables).
I would like to figure out if there is an association between the severity
of the symptoms with all the polutants. But there is a logical thought that
perhaps the symptoms are getting more severe after some days of e.g. heavy
loads of pollutants and not necessarily the same day. So how can I check if
there is such a pattern?
Which you think is the appropriate statistical approach to deal with these
data and how can I apply this to Stata?
I would like to thank you all in advanced for your time and your help and I
am looking forward for your advice!
