I have a robust design data set with 16 primary occasions and 10 secondary occasions. In this instance, how do I label time varying covariates so that RMark will read them correctly? I know that covij is used for a covariate that applies to the ith primary occasion and the jth secondary occasion. However, I have not seen how I would label a covariate that applies the the >=10th primary or secondary occasion. For example how would I label these:
1. A covariate that applies to the 10th primary and 10th secondary occasion.
2. A covariate that applies to the 10th primary and 1st secondary occasion.
2. A covariate that applies to the 1th primary and 10th secondary occasion.
Thanks,
Brad Alexander