Table 4.
Goodness-of-fit statistics for TRAC confirmatory factor analyses in Study 1 and Study 2.
| Model | χ 2 | df | CFI | TLI | RMSEA [90% CI] | SRMR |
|---|---|---|---|---|---|---|
| Study 1: University Students (N=617) | ||||||
| One-factor (19-item) | 523.538 | 135 | .900 | .887 | .068 [.062, .075] | .050 |
| Four-factor (19-item) | 362.339 | 148 | .948 | .940 | .048 [.042, .055] | .043 |
| Four-factor (18-item) | 308.236 | 131 | .953 | .946 | .047 [.040, .054] | .043 |
| Study 1: PTSD/AUD Subsample (n=129) | ||||||
| Four-factor (19-item) | 246.024 | 148 | .918 | .905 | .072 [.055, .087] | .060 |
| Four-factor (18-item) | 224.781 | 131 | .914 | .900 | .074 [.058, .091] | .060 |
| Study 2: National Sample (N=510) | ||||||
| Four-factor (19-item) | 284.128 | 148 | .978 | .975 | .042 [.035, .050] | .021 |
| Four-factor (18-item) | 263.928 | 131 | .977 | .974 | .045 [.037, .052] | .021 |
| Study 2: PTSD/AUD Subsample (n=356) | ||||||
| Four-factor (19-item) | 275.149 | 148 | .964 | .959 | .049 [.040, .058] | .030 |
| Four-factor (18-item) | 257.676 | 131 | .962 | .956 | .052 [.043, .061] | .031 |
Notes. TRAC = Trauma-Related Alcohol use Coping. Study 1 was conducted among trauma-exposed university students (N = 617) and a subsample of those who met criteria for probable PTSD/AUD (n=129); Study 2 was conducted nationally and included trauma-exposed adults who endorsed PTSD symptoms and past-year hazardous drinking (N = 510), as well as a subsample who met criteria for probable PTSD/AUD (n=356). All four-factor models included a single, higher-level factor, as well as the four lower-level factors. All chi-square tests are statistically significant at p < .001. CFI = comparative fit index; TLI = Tucker-Lewis index; RMSEA = root mean square error of approximation; SRMR = standardized root mean square residual.