*2.4. Data Validity and Reliability Indicators*

Confirmatory factor analysis (AFC) was performed with the weighted least squares means and variance adjusted (WLSMV). The fit of the theoretical models to the data was assessed using the Comparative Fit Index (CFI), Tucker-Lewis Index (TLI), and Root Mean Square Error of Approximation (RMSEA) with a 90% confidence interval. The fit was considered adequate if CFI and TLI ≥ 0.90, and RMSEA ≤ 0.10 [34]. The factor loadings (λ) of the items were considered adequate if λ ≥ 0.50. Reliability was analyzed by the alpha ordinal coefficient (α) (adequate reliability: α ≥ 0.70). The analyses were conducted for the total sample (Brazil) and for each region of the country in order to identify possible model fit problems due to cultural differences. The MPLUS 7.2 program (Muthén and Muthén, Los Angeles, CA, USA) was used. The data were found to be valid and reliable and parameters are shown in Table 1.


**Table 1.** Psychometric parameters for fit of the models to the samples of the instruments used (Depression, Anxiety and Stress Scale (DASS-21), and Impact of Event Scale-revised, (IES-R)).

\* Comparative Fit Index (CFI), Tucker-Lewis Index (TLI), and Root Mean Square Error of Approximation (RMSEA) with a 90% confidence interval; † With fit refinement.
