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Chunk #16 — 3.0 RESULTS

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A multidimensional assessment of the validity and utility of alcohol use disorder severity as determined by item response theory models.
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In initial EFA and CFA models (data not shown), factor loadings ranged from 0.699 for legal problems to 0.909 for activities given up, and the model fit statistics all supported a unideminsional model: Comparative Fit Index (CFI) = 0.997, Tucker Lewis Index (TLI) = 0.966, root mean squared error of approximation (RMSEA) = 0.018. As shown in Table 1, the 11 AUD criteria ranged in severity threshold parameter values from 1.49 for drinking more or for longer than intended to 3.50 for recurrent legal problems. The severity threshold parameter for each criterion was positively correlated with the total number of positive criteria among individuals endorsing the criterion in question, r=.86 (.98 with legal problems excluded), and negatively correlated with its prevalence, r=−.94. Accordingly, the mean number of criteria endorsed rose from 3.39 among the 11.5% of past-year drinkers who endorsed drinking more or longer than intended to 7.49 among the 0.9% who reported activities given up in favor of drinking. However, the mean number of positive criteria fell to 5.39 among the 1.0% of past-year drinkers who endorsed legal problems,