--- "Copeland, Laurel" <[email protected]>
wrote:
> A pharmacist asked me if I could do a test for trend
> over time from this
> table:
>
> Year Pharm Clin
> 1997 400 44
> 1998 221 54
> 1999 187 69
> 2000 123 63
> 2001 74 42
> 2002 145 149
>
> The table represents the number of reports of
> adverse events made by
> pharmacists (Pharm) and by clinicians (Clin),
> respectively.
You can do a linear test for trend by fitting a linear
regression model with -regress-. I think that to
compare year-to-year,however, you need denominators
for each year. In other words, for 2001 74 adverse
outcomes out of 75 patients is very different than 75
out of 1000 patients. If you can get denominator data,
then you may want to use -tabodds-.
Best,
Ricardo.
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