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Table 2 Overall Rasch model fit statistics

From: Variability in depression prevalence in early rheumatoid arthritis: a comparison of the CES-D and HAD-D Scales

Scale χ2 p Item Fit Residual mean (SD) Person Fit Residual mean (SD)
20-item CES-D 314.15 0.00 -0.14 (2.59) -0.10 (1.03)
13-item CES-D 37.10 0.07 -0.40 (1.08) -0.36 (1.11)
7-item HADS-D 16.78 0.27 -0.23 (0.61) -0.29 (0.77)
CES-D13+HADS-D 58.37 0.03 -0.14 (0.85) -0.27 (1.16)