Find support for Illness-death model. Only applicable to Frydman (1995) setting!!
support_frydman(data_idx)A: Matrix containing the intervals indicating when the transitions were censored. unique_L_times: Union of failure times in Group 4 and censoring times in Group 1. L_tilde: Left intervals for constructing the Q intervals R_tilde: Right intervals for constructing the Q intervals Q_mat: Matrix containing the support set for the 1->2 transition I: number of intervals in the support set Q.
List containing all the necessary data, output from the
msm_frydman function.
Finds the support sets Q for the interval censored transition 1 -> 2. The transitions 2->3 and 1->3 are exactly observed in this setting, therefore do not require determination of the support.
Frydman, H. (1995). Nonparametric Estimation of a Markov 'Illness-Death' Process from Interval- Censored Observations, with Application to Diabetes Survival Data. Biometrika, 82(4), 773-789. tools:::Rd_expr_doi("10.2307/2337344")