Table 5: SF-36 total scale Rasch analysis of summary of category structure for six waves of data collection

Wave 1Wave 2

Cat. LabelN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich Threshold
18411919(-3.15)1.301.17NONE7253019(-3.19)1.281.17NONE
213356630-1.36.991.01-1.8811496431-1.401.021.06-1.93
39673522-.25.66.61-.548281722-.26.67.63-.57
4402049.48.981.04.61343259.50.971.03.61
544040101.311.061.17.28b37154101.341.071.20.34b
6252116(2.82).931.011.53235936(2.86).92.991.56

Wave 3Wave 4
Cat. LabelN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich Threshold

16175720(-3.14)1.251.15NONE5580922(-3.06)1.241.15NONE
28870129-1.391.041.08-1.877228628-1.351.051.10-1.79
36328520-.28.73.67-.575012519-.30.78.71-.54
4294869.48.94.96.482580710.45.90.88.38
52899191.341.091.16.41b24560101.321.101.13.41
6184706(2.86).87.931.55152976(2.85).86.911.54

Wave 5Wave 6
Cat. LabelN%Average MeasuresInfit MnSqOutfit MnSqAndrich ThresholdN%Average MeasuresInfit MnSqOutfit MnSqAndrich Threshold

14704124(-3.00)1.261.16NONE3637725(-2.96)1.231.14NONE
25490527-1.311.061.09-1.723798726-1.301.061.07-1.67
33621618-.30.83.76-.492495217-.31.88.83-.49
42117211.43.87.81.271555411.42.87.79.23
51884791.291.131.15.461356091.291.151.15.50
6115836(2.80).83.881.4884956(2.78).83.881.44

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.