Table 14: SF-36 mental health scale Rasch analysis Infit and Outfit statistics for six waves of data collection.

Wave 1Wave 2Wave 3
SF36 ITEM InfitOutfitInfitOutfitInfitOutfit
MNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTD

17:Q5A0.29-9.90.32-9.90.26-9.90.28-9.90.30-9.90.32-9.9
18:Q5B0.43-9.90.46-9.90.43-9.90.46-9.90.48-9.90.50-9.9
19:Q5C0.31-9.90.34-9.90.29-9.90.31-9.90.32-9.90.34-9.9
20:Q62.649.92.879.92.919.93.069.92.549.92.749.9
23:Q9A1.087.71.159.91.033.21.129.91.043.51.096.7
24:Q9B1.259.91.179.91.409.91.299.91.419.91.319.9
25:Q9C1.449.91.309.91.599.91.399.91.519.91.339.9
26:Q9D1.229.91.339.91.149.91.289.91.107.11.199.9
27:Q9E1.129.91.179.91.087.81.129.91.075.31.086.3
28:Q9F0.90-6.60.88-8.31.021.00.98-0.90.96-2.00.93-3.6
29:Q9G0.88-9.90.87-9.90.90-7.40.89-7.80.88-7.80.87-8.2
30:Q9H1.229.91.299.91.158.51.249.91.094.61.167.9
31:Q9I0.72-9.90.73-9.90.76-9.90.77-9.90.73-9.90.74-9.9
32:Q100.72-9.90.77-9.90.78-9.90.81-9.90.87-9.90.91-6.8

Wave 4Wave 5Wave 6
SF36 ITEMInfitOutfitInfitOutfitInfitOutfit
MNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTD

17:Q5A0.31-9.90.34-9.90.34-9.90.37-9.90.36-9.90.39-9.9
18:Q5B0.50-9.90.52-9.90.52-9.90.54-9.90.53-9.90.55-9.9
19:Q5C0.34-9.90.36-9.90.37-9.90.39-9.90.38-9.90.41-9.9
20:Q62.169.92.339.91.969.92.159.91.919.92.079.9
23:Q9A1.042.71.075.31.021.71.053.41.031.81.042.2
24:Q9B1.379.91.259.91.369.91.259.51.339.91.258.3
25:Q9C1.509.91.369.91.519.91.369.91.429.91.329.1
26:Q9D1.159.31.239.91.168.71.269.91.136.21.208.8
27:Q9E1.117.91.118.01.085.11.084.81.105.21.094.4
28:Q9F0.97-1.60.94-3.20.95-2.20.91-4.20.91-3.50.89-4.4
29:Q9G0.87-8.10.86-8.50.84-9.20.83-9.70.85-7.30.84-7.8
30:Q9H1.125.61.167.31.135.81.229.31.093.61.155.3
31:Q9I0.76-9.90.77-9.90.76-9.90.77-9.90.76-9.90.78-9.9
32:Q100.86-9.90.91-6.90.90-6.30.94-3.90.96-2.41.000.2

Notes. MNSQ = mean square residual fit statistic; ZSTD: standardized mean square residual fit statistic; values in italic for Infit or Outfit MnSq > 1.34; values underlined for Infit or Outfit MnSq < 0.64.