Model selection results.

Differences in AIC values, ΔAIC = AIC—AICmin, between the different models with 3 hidden states, where AICmin is the value of the model with the lowest AIC. The best fit is given by the minimum AIC. For all the tested state distributions, covariate model 1 was preferred, and for all covariate models, the dependent log-normal state distribution was preferred. Because the runtimes for the correlated gamma model are high, only Model 1 was fitted. The best model is highlighted in bold. np: number of parameters.