Table 2.
Goodness of fit measures comparing confirmatory factor analysis models of Nicotine Dependence: Unidimensional, three multi-symptom domain bifactor, and five multi-symptom domain bifactor models are presented.
| Name | Structure | Multi-Symptom Sub-Domains | Df | AIC | BIC | logLik | X2 | df | p |
|---|---|---|---|---|---|---|---|---|---|
| Cigarette
| |||||||||
| Model A | Uni | 0 | 1159 | 98393.51 | 98579.10 | −49170.75 | |||
| Model B | Bifactor | 3 | 1153 | 97236.38 | 97464.80 | −48586.19 | 1169.12 | 6.00 | <0.01 |
| Model E | Bifactor | 5 | 1149 | 97034.38 | 97291.36 | −48481.19 | 210.00 | 4.00 | <0.01 |
|
| |||||||||
| Cigarette+Cigar
| |||||||||
| Model A | Uni | 0 | 204 | 6290.57 | 6404.06 | −3119.29 | |||
| Model B | Bifactor | 3 | 198 | 6260.30 | 6399.98 | −3098.15 | 42.27 | 6.00 | <0.01 |
| Model E | Bifactor | 5 | 194 | 6242.19 | 6399.32 | −3085.09 | 26.12 | 4.00 | <0.01 |
|
| |||||||||
| Cigar
| |||||||||
| Model A | Uni | 0 | 45 | 2383.32 | 2494.80 | −1165.66 | |||
| Model B | Bifactor | 3 | 39 | 2361.70 | 2498.91 | −1148.85 | 33.62 | 6.00 | <0.01 |
| Model E | Bifactor | 5 | 35 | 2371.20 | 2525.56 | −1149.60 | −1.49 | 4.00 | >0.99 |
|
| |||||||||
| Smokeless
| |||||||||
| Model A | Uni | 0 | 129 | 5110.52 | 5225.48 | −2529.26 | |||
| Model B | Bifactor | 3 | 123 | 5073.77 | 5215.26 | −2504.89 | 48.75 | 6.00 | <0.01 |
| Model E | Bifactor | 5 | 119 | 5071.06 | 5230.24 | −2499.53 | 10.71 | 4.00 | 0.03 |
Note: Available degrees of freedom (Df) in unidimensional model reflect the number of unique patterns of responses minus 1.