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Table 2 Results of exploratory factor analysis of the DASS-21 and the DASS-17 (extraction by maximum likelihood)

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

Item number Loadings of 3-factors solutiona Loadings of 1-factor solution, DASS-21 Loadings of 1-factor solution, DASS-17
Factor 1 Factor 2 Factor 3
1 .535 −.046 −.057 .531 .528
2 .312 −.182 .307 .317  
3 .454 .580 −.207 .439 .447
4 .624 .037 .155 .639 .626
5 .505 .164 .228 .525 .510
6 .351 .090 .245 .363  
7 .452 −.346 .255 .452 .429
8 .461 .078 −.139 .456 .440
9 .501 −.265 .093 .494 .491
10 .606 .260 .057 .614 .617
11 .508 .018 .359 .529 .503
12 .616 −.029 .286 .632 .624
13 .619 .173 −.035 .623 .640
14 .312 −.004 .200 .320  
15 .540 −.153 .087 .539 .540
16 .508 .242 .065 .515 .524
17 .608 .144 −.187 .598 .614
18 .364 −.042 .126 .368  
19 .559 −.156 −.037 .554 .546
20 .656 −.400 −.362 .583 .590
21 .733 .065 −.170 .710 .706
  1. DASS Depression Anxiety Stress Scale, aOblimin rotation with Kaiser normalization. After that oblique rotation, the correlations among the three factors were as follows: r(F1,F2) = −0.31, r(F1,F3) = −0.28, and r(F2,F3) = 0.56