Calculate sensitivity and specificity for repeated data

[Lieu Trinh]

Hello,

I would like to have some help with calculating sensitivity and specificity for repeated data (a patient has multiple falls) using test (0 and 1)

I use the following codes:

xtset id
xtgee fall i.test i.sex, family(poisson) link(log) corr(independent) vce(robust) eform
predict pred_prob, mu
gen pred_class = (pred_prob > 0.5)
rmclass pred_class fall, cluster(mrn)

But I am not sure. Do you have an example that I can follow?

Many thanks,

Lieu