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 |