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Table 3 Partial confirmatory factor analysis for the DASS-21

From: Factor structure of the depression anxiety stress Scale-21 (DASS-21): Unidimensionality of the Arabic version among Egyptian drug users

Factors Null χ2 Null df Implied χ2 Implied df NFI CFI TLI RMSEA
Two 973.5 210 247.6 169 0.75 0.90 0.87 0.06
Three 973.5 210 199.1 150 0.80 0.94 0.91 0.05
Four 973.5 210 155.2 132 0.84 0.97 0.95 0.03
  1. Null χ2 and null df come from Bartlett’s test of sphericity, implied χ2 and implied df come from the Goodness-of-Fit test. NFI Normed fit index, CFI Comparative fit index, TLI Tucker-Lewis index, RMSEA Root mean square error of approximation