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. Author manuscript; available in PMC: 2021 Apr 1.
Published in final edited form as: Int J Drug Policy. 2020 Mar 5;78:102716. doi: 10.1016/j.drugpo.2020.102716

Table 2.

Model Fit Statistics and Entropy for 1-Class through 4-Class models

Information Criteria 1-Class 2-Class 3-Class 4-Class
N Free Parameters 7 15 23 31
N Classes 1 2 3 4
AICa 6026.84 5789.06 5606.48 5578.81
BICb 6061.06 5862.40 5718.94 5730.39
SABICc 6038.83 5814.76 5645.89 5631.93
Entropy --- 0.72 0.82 0.72
LLd −3006.42 −2879.53 −2780.24 −2758.41
BLRTe --- −3006.4 (p<0.001) −2879.5 (p<0.001) −2780.2 (p<0.001)
Chi-Square 1866.74 436.73 198.48 123.33
df 120 112 104 96
p value <0.001 <0.001 <0.001 0.032
Number in Each Class
Class 1 982 (100%) 157 (16%) 93 (9.5%) 42 (4.3%)
Class 2 --- 825 (84%) 163 (16.6%) 93 (9.5%)
Class 3 --- --- 726 (73.9%) 304 (30.9%)
Class 4 --- --- --- 543 (55.3%)

Note. Bolded values indicate optimal fit among the four models.

a

AIC = Akaike Information Criteria

b

BIC = Bayesian Information Criteria

c

SaBIC = Sample-Adjusted Bayesian Information Criteria

d

LL = Log Likelihood

e

BLRT = Bootstrapped likelihood ratio test