In analysing data from a cohort of 6500 children recruited from 3500 families, I would like to examine if the event (developing typhoid) is clustered within households. While multiple events per child is possible, the data is set up as one record per child and only one event per child is included. If clustering within households is present, I will probably use a GEE for analysis else a logistic regression.
Ideally I would like a way of quantifying ICC when the outcome is number of events.
Could someone please provide me an indication of where to look for answers.
Thanks!

Jacob