Table 17: SF-36 mental health scale Rasch analysis of summary of category structure for six waves of data collection.

WAVE 1WAVE 2 (p. 120)WAVE 3 (p. 125)

CAT. LABELN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich Threshold
12266714( -3.07)1.381.20NONE1846313( -3.18)1.411.22NONE1432312( -3.18)1.381.22NONE
24942030-1.06.75.78-1.914301930-1.08.76.81-2.033341628-1.12.78.85-2.02
3150869-.17.96.86.66122918-.15.97.89.71108459-.17.98.85.57
42564615.401.021.11-.42075314.431.001.12-.31800215.441.001.06-.3
528636171.141.061.31.524231171.161.081.38.518787161.201.131.28.63
62497315(2.54)1.001.071.152336016(2.56)1.001.081.171831315(2.60).951.021.19

WAVE 4WAVE 5WAVE 6
CAT. LABELN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich Threshold

11256113( -3.08)1.371.21NONE1033314( -3.00)1.381.23NONE 747114( -2.98)1.371.21NONE
22723329 -1.11 .80 .88 -1.912085428 -1.08 .82 .89 -1.821452927 -1.09 .83 .91 -1.80
3 954810 -.18 .98 .82 .51 751510 -.19 .94 .76 .50 567511 -.19 .94 .78 .43
41524016 .42 1.001.00 -.31234817 .40 .97 .94 -.4 902417 .41 .98 .94 -.3
51574116 1.17 1.141.22 .601218316 1.151.191.27 .61 869816 1.151.191.24 .64
61514716(2.57) .93 .99 1.161145415(2.53) .90 .99 1.11 841516(2.51) .90 .96 1.07

Notes. Andrich threshold category increase of >5; Andrich threshold category decrease where an increase is expected; values in italic for Infit or Outfit MnSq > 1.34; values underlined for Infit or Outfit MnSq < 0.64.