Table 2. Count of methods used among analyzed studies.

Method	Retrospective count	Prospective count
InSight/Dascena	5	1
Regression models	6 (4 logistic, 2 linear)	1 (logistic)
Markov models	4 (3 HMM, 1 MM)	–
Vector machine	4 (3 SVM, 1 RVM)	–
Bayesian network	2	–
Hazard models	2	–
Neural network	–	1
Fuzzy c-means clustering	1	–
Regression tree	–	1
Net classifier	1	–
Linear dynamic	1	–
Random forest	1	–

Abbreviations: HMM, hidden Markov model; MM, Markov model; RVM, relevance vector machine; SVM, support vector machine.