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. 2018 Nov 26;13(11):e0206915. doi: 10.1371/journal.pone.0206915

Table 2. Fit indices of mixture distribution IRT models: 1–7 class solution based on 29 medical conditions (N = 68,400 patients).

#Latent classes -2 Log Likelihood #Parameters estimated BIC
1 1,769,508 50 1,769,704
2 1,681,100 101 1,682,223
3 1,658,348 152 1,660,039
4 1,643,788 203 1,646,048
5 1,621,948 254 1,624,776
6 1,615,130 305 1,618,830
7 1,609,394 356 1,613,357