Table 2: SF-36 total scale Rasch analysis Infit and Outfit statistics for six waves of data collection.

Wave 1Wave 2Wave 3
SF36 ITEMINFITOutfitInfitOutfitInfitOutfit
MNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTD

1: Q1 0.92-6.70.96-2.90.86-9.90.90-7.30.83-9.90.86-9.8
2: Q2 0.51-9.90.55-9.90.53-9.90.57-9.90.54-9.90.56-9.9
3: Q3A 1.032.11.021.41.127.01.095.51.063.01.021.2
4: Q3B 0.59-9.90.61-9.90.64-9.90.65-9.90.72-9.90.73-9.9
5: Q3C 0.54-9.90.56-9.90.56-9.90.57-9.90.59-9.90.60-9.9
6: Q3D 0.82-9.90.82-9.90.84-9.90.84-9.90.86-8.60.86-8.7
7: Q3E 0.46-9.90.48-9.90.48-9.90.50-9.90.54-9.90.56-9.9
8: Q3F 0.66-9.90.67-9.90.72-9.90.72-9.90.75-9.90.75-9.9
9: Q3G 0.76-9.90.78-9.90.83-9.90.85-9.90.94-3.70.94-3.4
10: Q3H 0.46-9.90.50-9.90.53-9.90.56-9.90.65-9.90.68-9.9
11: Q3I 0.27-9.90.30-9.90.29-9.90.31-9.90.37-9.90.39-9.9
12: Q3J 0.17-9.90.19-9.90.13-9.90.15-9.90.17-9.90.18-9.9
13: Q4A 0.40-9.90.41-9.90.41-9.90.42-9.90.49-9.90.50-9.9
14: Q4B 0.57-9.90.58-9.90.61-9.90.61-9.90.66-9.90.66-9.9
15: Q4C 0.50-9.90.51-9.90.51-9.90.52-9.90.57-9.90.58-9.9
16: Q4D 0.51-9.90.53-9.90.54-9.90.55-9.90.59-9.90.60-9.9
17: Q5A 0.25-9.90.27-9.90.22-9.90.23-9.90.25-9.90.26-9.9
18: Q5B 0.37-9.90.39-9.90.36-9.90.37-9.90.39-9.90.41-9.9
19: Q5C 0.27-9.90.29-9.90.24-9.90.26-9.90.26-9.90.28-9.9
20: Q6 2.439.92.599.92.489.92.649.92.369.92.489.9
21: Q7 1.849.91.909.91.969.92.019.91.709.91.739.9
22: Q8 2.099.92.179.92.149.92.219.91.939.91.999.9
23: Q9A 1.489.91.529.91.489.91.529.91.449.91.469.9
24: Q9B 1.479.91.409.91.649.91.559.91.649.91.559.9
25: Q9C 1.679.91.539.91.829.91.669.91.749.91.579.9
26: Q9D 1.699.91.739.91.609.91.649.91.509.91.529.9
27: Q9E 1.559.91.589.91.559.91.589.91.499.91.509.9
28: Q9F 1.075.11.032.41.199.91.159.01.136.91.094.9
29: Q9G 1.022.01.000.21.043.01.021.41.021.11.00-0.1
30: Q9H 1.639.91.629.91.499.91.509.91.359.91.369.9
31: Q9I 0.84-9.90.84-9.90.88-9.90.88-9.90.84-9.90.84-9.9
32: Q10 0.79-9.90.79-9.90.84-9.90.83-9.90.92-6.60.92-6.6
33: Q11A0.77-9.90.76-9.90.64-9.90.63-9.90.66-9.90.65-9.9
34: Q11B1.889.91.909.91.779.91.809.91.629.91.629.9
35: Q11C1.043.31.054.10.95-4.50.95-3.80.99-0.90.99-0.5
36: Q11D1.789.91.839.91.819.91.869.91.689.91.709.9

Wave 4Wave 5Wave 6
SF36 ITEMInfitOutfitInfitOutfitInfitOutfit
MNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTDMNSQZSTD

1: Q1 0.72-9.90.73-9.90.69-9.90.70-9.90.65-9.90.65-9.9
2: Q2 0.50-9.90.52-9.90.49-9.90.50-9.90.46-9.90.47-9.9
3: Q3A 1.114.41.062.31.186.01.113.91.266.41.174.3
4: Q3B 0.78-9.90.78-9.90.81-9.10.81-9.40.91-3.60.90-4.1
5: Q3C 0.62-9.90.64-9.90.65-9.90.66-9.90.72-9.90.72-9.9
6: Q3D 0.87-7.10.86-7.70.92-3.60.90-4.60.97-0.90.93-2.4
7: Q3E 0.56-9.90.57-9.90.61-9.90.63-9.90.70-9.90.70-9.9
8: Q3F 0.73-9.90.73-9.90.71-9.90.72-9.90.76-9.90.76-9.9
9: Q3G 0.98-1.00.97-1.31.031.51.010.61.093.31.041.6
10: Q3H 0.74-9.90.76-9.90.83-8.00.85-7.40.94-2.40.93-2.6
11: Q3I 0.41-9.90.43-9.90.48-9.90.51-9.90.55-9.90.57-9.9
12: Q3J 0.24-9.90.26-9.90.29-9.90.31-9.90.33-9.90.34-9.9
13: Q4A 0.52-9.90.54-9.90.58-9.90.60-9.90.60-9.90.61-9.9
14: Q4B 0.69-9.90.69-9.90.73-9.90.72-9.90.74-8.70.74-8.9
15: Q4C 0.62-9.90.63-9.90.67-9.90.68-9.90.71-9.90.71-9.9
16: Q4D 0.64-9.90.64-9.90.68-9.90.68-9.90.71-9.90.71-9.9
17: Q5A 0.27-9.90.29-9.90.30-9.90.32-9.90.32-9.90.34-9.9
18: Q5B 0.42-9.90.43-9.90.45-9.90.47-9.90.47-9.90.49-9.9
19: Q5C 0.29-9.90.31-9.90.32-9.90.34-9.90.33-9.90.35-9.9
20: Q6 2.179.92.279.92.069.92.149.92.009.92.069.9
21: Q7 1.619.91.639.91.529.91.539.91.409.91.419.9
22: Q8 1.759.91.809.91.659.91.689.91.569.91.599.9
23: Q9A 1.409.91.419.91.369.91.369.91.349.91.359.9
24: Q9B 1.629.91.539.91.619.91.539.91.589.91.519.9
25: Q9C 1.739.91.609.91.759.91.629.91.659.91.579.9
26: Q9D 1.519.91.539.91.479.91.499.91.419.91.429.9
27: Q9E 1.519.91.529.91.449.91.459.91.469.91.479.9
28: Q9F 1.157.51.115.51.167.01.125.31.124.61.093.6
29: Q9G 1.021.61.010.51.031.61.010.81.062.71.042.1
30: Q9H 1.369.91.369.91.359.91.379.91.299.91.299.9
31: Q9I 0.89-8.20.89-7.90.92-5.20.92-4.90.91-5.10.91-4.8
32: Q10 0.93-5.10.94-4.71.00-0.21.000.01.063.01.063.1
33: Q11A0.67-9.90.66-9.90.67-9.90.66-9.90.70-9.90.69-9.9
34: Q11B1.589.91.599.91.449.91.459.91.389.91.389.9
35: Q11C1.010.51.010.90.99-0.61.00-0.20.98-1.00.98-0.9
36: Q11D1.619.91.649.91.519.91.539.91.439.91.439.9

Notes. MNSQ = mean square residual fit statistic; ZSTD: standardized mean square residual fit statistic; Z-STD ≤-2.0 or ≥2.0; values in italic for Infit or Outfit MnSq > 1.34; values underlined for Infit or Outfit MnSq < 0.64.