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. 2016 Sep 28;145(1):208–215. doi: 10.1017/S0950268816002065

Fig. 1.

Fig. 1.

Markov progression model of disease incidence. The definition of an ‘episode’ differs between models. Individuals start in state 1 and can progress to state 2. Once in state 2, women can either fail to have an episode and enter state 3 after one cycle or have an episode and enter state 5. From state 3 women can either fail to have an episode and enter state 4 after one cycle or have an episode and enter state 5. The progression pattern between states 5 and 8 mirrors that between states 1 and 4; state 8 is an absorbing state.