Dear All,
If one is faced with a longitudinal data set as given below, where the
variable test is the result of a blood test for protein (pos=protein;
neg=no protein). Can one calculate the prevalence of protein in the
blood? Is it sensible?
id test
1 pos
1 pos
1 pos
1 neg
2 pos
2 neg
2 neg
2 pos
2 neg
Regards,
Raphael
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