Supplemental Material for
Testing the Integration of ICF and Behavioral Models of Disability in Orthopedic
Patients: Replication and Extension
Francis Quinn, Marie Johnston, Diane Dixon, Derek W. Johnston, Beth Pollard and David I.
Rowley
This file contains further statistical details of the measurement models referred to in the main
article. Included for each model tested are indicator parameter estimates, factor variance
explained by each indicator, indicator error terms, and interfactor correlations.
ICF Model (Time 1)
Table S1 shows factor loadings and variance explained by the latent construct for each
indicator in the model.
Factor
Item Impairment Activity Limitation
I1
.76
I2
.81
I3
.62
I4
.49
W1
.80
W2
.81
W3
.82
R2
.58
.65
.39
.24
.64
.66
.67
Table S1. Standardized Solutions by Confirmatory Factor Analysis for the final ICF measurement model at Time 1.
The measurement model with factor loadings, error values and inter-factor correlation is
shown in Figure S1.
.65
I1
.59
I2
.76
.81
.62
.79
I3
.87
I4
Impairment
.49
.59*
.58
W1
.80
.81
.57
Activity Limitation
W2
.82
.56
W3
Figure S1. CFA results for ICF model at Time 1 showing standardized coefficients.
TPB Model (Time 1)
Table S2 below shows factor loadings and variance explained for each indicator in the model.
Item Intention
INT1
.97
INT3
.81
PBC3
PBC4
PBC5
PBC6
W1
W2
W3
Factor
PBC Activity Limitation
.81
.89
.92
.77
.87
.79
.77
R2
.94
.65
.66
.79
.84
.60
.75
.62
.59
Table S2. Standardized Solutions by Confirmatory Factor Analysis for the TPB measurement model at Time 1.
The measurement model including interfactor correlations is shown in Figure S2.
-.64*
.87*
-.70*
Intention
.97
Activity
Limitation
PBC
.81
.81
INT1
PBC
3
INT3
.77
.89
PBC
4
.59
W1
PBC
5
.58
.24
PBC
6
.92
.87
.77
.79
W3
W2
.63
.45
.40
.50
.62
.64
Figure S2. CFA of TPB measurement model at Time 1 showing standardized coefficients and interfactor correlations.
Integrated model (Time 1)
As indicators, factor loadings and error terms are identical to the non-integrated models, these
are not shown and can be found above. Interfactor correlations are shown in Figure S3.
.59*
-.45*
-.41*
Impairment
-.64*
.87*
Intention
-.70*
PBC
Activity
Limitation
Figure S3. CFA model for ICF/TPB model at Time 1, with inter-factor correlations shown.
ICF Model (Time 2)
Table S4 shows factor loadings and variance explained for each indicator in the model.
Factor
Item Impairment Activity Limitation
I1
.64
I2
.76
I3
.80
I4
.59
W1
.76
W2
.87
W3
.94
R2
.41
.57
.63
.35
.57
.75
.88
Table S4. Standardized Solutions by Confirmatory Factor Analysis for the ICF measurement model at Time 2.
The measurement model with factor loadings, error values and inter-factor correlation is
shown in Figure S4.
.77
I1
.65
I2
.64
.76
.80
.61
I3
.81
I4
Impairment
.59
.72*
.65
W1
.76
.87
.50
Activity Limitation
W2
.94
.35
W3
Figure S4. CFA results for ICF model at Time 2 showing standardized coefficients and interfactor correlation.
TPB model (Time 2)
Table S5 shows factor loadings and variance explained for each indicator in the measurement
model, while Figure S5 shows standardized coefficients, error terms, and interfactor
correlations.
R2
Factor
PBC Activity Limitation
Item Intention
INT1
.96
INT3
.95
PBC3
PBC4
PBC5
PBC6
W1
W2
W3
.93
.91
.70
.85
.86
.66
.62
.77
.81
.84
.92
.93
.81
.78
.88
.91
Table S5. Standardized Solutions by Confirmatory Factor Analysis for the TPB measurement model at Time 2.
-.79*
.92*
-.83*
Intention
.97
.84
.95
PBC3
INT1
Activity
Limitation
PBC
INT3
.81
.92
PBC4
.93
.79
.91
PBC6
W1
PBC5
.88
W3
W2
.55
.27
.31
.59
.39
.38
.62
.47
.41
Figure S5. CFA of TPB model at Time 2 showing standardized coefficients and interfactor correlations.
Integrated model (Time 2)
As indicators, factor loadings and error terms are identical to the non-integrated models, these
are not shown and can be found above. Interfactor correlations are shown in Figure S6.
.72*
-.49*
-.43*
Impairment
-.78*
.92*
Intention
-.82*
PBC
Activity
Limitation
Figure S6. Measurement model for ICF/TPB model at Time 2, with inter-factor correlations shown. Note. Indicators, factor loadings
and error terms not shown. These data are identical to the non-integrated models and can be found above.