Table 2.
Indices of model fit from latent class growth analyses of chronic pain in arthritis and cancer
| k | AIC | BIC | Entropy | VLMR-LRT p |
|---|---|---|---|---|
| Whole sample | ||||
| 1 | 177,684.561 | 177,839.979 | – | – |
| 2 | 133,343.915 | 133,476.949 | 0.871 | < 0.001 |
| 3 | 130,255.155 | 130,454.705 | 0.848 | < 0.001 |
| 4 | 126,764.571 | 127,030.638 | 0.851 | < 0.001 |
| + Quadratic | 124,206.071 | 124,501.701 | 0.859 | |
| + Cubic | 123,577.681 | 123,902.874 | 0.869 | |
| 5 | 125,988.308 | 126,320.892 | 0.901 | < 0.001 |
| Arthritis | ||||
| 1 | 14,198.301 | 14,298.893 | – | – |
| 2 | 11,316.565 | 11,407.577 | 0.702 | < 0.001 |
| 3 | 11,200.776 | 11,339.689 | 0.702 | 0.008 |
| 4 | 11,105.289 | 11,292.103 | 0.757 | 0.001 |
| + Quadratic | 10,942.055 | 11,148.029 | 0.841 | |
| + Cubic | 10,914.137 | 11,139.272 | 0.850 | |
| 5 | 11,084.221 | 11,318.936 | 0.778 | 0.29 |
| Cancer | ||||
| 1 | 6298.329 | 6384.856 | – | – |
| 2 | 4662.729 | 4736.895 | 0.904 | < 0.001 |
| 3 | 4474.875 | 4586.123 | 0.998 | 0.052 |
| + Quadratic | 4420.884 | 4544.492 | 0.998 | |
| + Cubic | 4390.708 | 4526.677 | 0.998 | |
| 4 | 4198.800 | 4347.131 | 0.998 | 0.37 |
| 5 | 4128.545 | 4313.958 | 0.947 | 0.37 |
In the whole sample and cancer subsample, the five class linear models failed to converge
AIC Akaike information criterion, BIC Bayesian information criterion, VLMR-LRT Vuong-Lo-Mendell-Rubin likelihood ratio test
Statistics highlighted in bold are the best fitting for a particular index
Standard deviations are reported in brackets for continuous variables (BMI, age, GHQ-12 and social engagement measures)