Advanced statistical analysis of epidemiological studies

Common features
In order to use PROC GENMOD, a data file must be created for each
transition and for each combination of covariates, including:
e.g.
• time spent in state
• number of transitions
Age 1 Age 2 Age 3
Exposed T 01 , D 01 T 02 , D 02 T 03 , D 03
Non-exposed T 11 , D 11 T 12 , D 12 T 13 , D 13
This enables us to analyse the intensities (rates) and estimate rate
ratios
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