Table 7: SF-36 Physical health scale Rasch analysis item statistics for six waves of data collection.

Wave 1Wave 2Wave 3
SF36 ITEM MEASUREMODEL
S.E.
PTMEA
CORR.
MEASUREMODEL
S.E.
PTMEA
CORR.
MEASUREMODEL
S.E.
PTMEA
CORR.

1:Q1-0.840.01-0.21-0.920.01-0.24-0.910.01-0.18
3:Q3A1.620.020.371.580.020.441.630.020.43
4:Q3B0.020.010.590.000.010.610.130.010.60
5:Q3C-0.050.010.59-0.080.010.60-0.080.010.59
6:Q3D0.520.010.600.480.010.630.550.010.62
7:Q3E-0.240.010.65-0.270.010.67-0.190.010.67
8:Q3F0.210.010.570.260.010.580.330.010.54
9:Q3G0.110.010.640.150.010.660.340.010.63
10:Q3H-0.340.010.67-0.340.010.68-0.190.010.67
11:Q3I-0.570.010.59-0.620.010.59-0.540.010.61
12:Q3J-0.740.010.43-0.840.010.40-0.800.010.40
13:Q4A0.960.010.420.950.010.411.020.020.38
14:Q4B1.320.010.421.370.020.431.460.020.39
15:Q4C1.160.010.461.170.010.501.200.020.42
16:Q4D1.200.010.441.220.020.471.280.020.42
21:Q7-0.740.01-0.050.990.01-0.19-0.950.01-0.02
22:Q80.360.01-0.18-0.780.01-0.150.040.01-0.14
33:Q11A-2.220.010.34-2.490.010.34-2.460.010.32
34:Q11B-0.070.010.020.040.01-0.07-0.090.010.02
35:Q11C-1.240.010.38-1.420.010.38-1.270.010.37
36:Q11D-0.420.01-0.09-0.450.01-0.18-0.500.01-0.08

Wave 4Wave 5Wave 6
SF36 ITEM MEASUREMODEL
S.E.
PTMEA
CORR.
MEASUREMODEL
S.E.
PTMEA
CORR.
MEASUREMODEL
S.E.
PTMEA
CORR.

1:Q1-1.100.01-0.14-1.210.01-0.13-1.320.02-0.06
3:Q3A1.640.020.421.630.030.421.790.040.39
4:Q3B0.260.020.600.330.020.600.470.020.57
5:Q3C0.020.010.600.050.020.580.090.020.56
6:Q3D0.590.020.620.670.020.620.770.020.59
7:Q3E-0.160.010.65-0.090.020.65-0.020.020.64
8:Q3F0.320.020.570.300.020.570.340.020.53
9:Q3G0.460.020.630.620.020.610.760.020.60
10:Q3H-0.070.010.660.040.020.650.170.020.63
11:Q3I-0.500.010.58-0.430.020.58-0.400.020.58
12:Q3J-0.760.010.42-0.750.010.41-0.790.020.39
13:Q4A1.010.020.371.030.020.340.990.030.34
14:Q4B1.470.020.381.470.030.351.450.030.33
15:Q4C1.270.020.431.290.020.401.290.030.35
16:Q4D1.310.020.411.330.020.391.320.030.36
21:Q7-1.080.01-0.01-1.170.010.01-1.310.020.08
22:Q8-0.190.01-0.13-0.350.01-0.06-0.530.02-0.02
33:Q11A-2.450.010.28-2.430.020.26-2.490.020.21
34:Q11B-0.200.010.01-0.380.020.06-0.530.020.11
35:Q11C-1.190.010.34-1.080.010.33-1.080.020.31
36:Q11D-0.680.01-0.09-0.850.01-0.04-0.980.020.02

Note. MODEL S.E. = model standard error; PTMEA CORR = point measure correlation.