Table 7 Somatic sub-scale readings.

From: Developing and validating a short version of the multidimensional depression scale in asian adolescents sample using rasch analysis

Scale

Infit MNSQ (Person, Item)

Outfit MNSQ (Person, Item)

Separation (Person, Item)

Reliability (Person, Item)

% of variance explained by the measures

Eigenvalue of contrasts

Misfitting items, HFI, LFI

Largest correlated pairs, (Largest correlation observed)

Largest DIF item observed, (DIF Contrast)

MDAS52-4pt

0.99, 1.00

0.99, 0.99

2.46, 6.74

0.86, 0.98

51.4%

1st: 1.66, 2nd: 1.21, 3rd: 1.21, 4th: 1.11, 5th: 1.08

(NONE), #28, #33

#28&#30, (− 0.24)

#28, (− 0.30)

MDAS24-4pt

0.99, 0.99

0.99, 0.99

2.03, 7.06

0.81, 0.98

55.5%

1st: 1.44, 2nd: 1.27, 3rd: 1.15, 4th: 1.12, 5th: 1.02

(NONE), #27, #25

#27&#30, #25&#29*, #29&#30*, #26&#29*, #25&#27*, #26&#33*, #27&#33*, #25&#26*, (− 0.29)

#29, (− 0.32)

      

Removed items: #28, #21, #32, #34, #35, #36

  1. Scale indicates the version of scale which we obtained the scale readings; * Indicates the item pairs were not the largest correlated pairs but exceeded ± .20; #1 indicates item 1 and so on; HFI indicates the item with highest item fit MNSQ; LFI indicates the item with lowest item fit MNSQ; 4pt indicates the 4 point-scale version; 1st indicates the 1st contrast in the PCAR and so on.
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