Introduction
Methods
Patients and study design
Measures
SRI scale
SF36
Sociodemographic and other correlates
Cross cultural adaptation
Translation and back translation
Pretesting the pre-final Arabic version
Analysis
Results
Patients profiles
Variable | Valid N (%) |
---|---|
Disease | |
COPD | 127 (85.2%) |
NMD | 8 (5.40%) |
OHS | 9 (6.00%) |
RCWD | 4 (2.70%) |
Lung fibrosis | 1 (0.70%) |
Gender | |
Male | 53 (35.57%) |
Female | 96 (64.43%) |
Age in years (mean ± SD) | 69.81 ± 10.15 |
Smoking | |
Current smokers | 31 (21.00%) |
Previous smokers | 93 (62.00%) |
Never smoked | 25 (17.00%) |
Pack-year (mean ± SD) | 59.83 ± 43.98 |
BMI (k/m2) (mean ± SD) | 30.39 ± 8.64 |
ED visits in past year per patient due to respiratory problems (mean ± SD) | 2.84 ± 2.73 |
Hospital admission in past year per patient due to respiratory problems (mean ± SD) | 2.96 ± 3.00 |
HMV use in months (mean ± SD) | 32.6 ± 36.20 |
HMV use per day (mean ± SD) | 8.1 ± 3.90 |
Dimensionality and internal construct validity
Internal consistency reliability
Scale | Number (n) | Mean ± SD scores | Score ranges (min–max) | Cronbach’s alpha α |
---|---|---|---|---|
SRI-RC | 8 items | 67.5 ± 18.3 | 21.88–100.00 | 0.8 |
SRI-PF | 6 items | 42.25 ± 23.7 | 0–100.00 | 0.79 |
SRI-AS | 7 items | 66.82 ± 18.66 | 17.85–100.00 | 0.72 |
SRI-SR | 6 items | 69.49 ± 20.0 | 25.00–100.00 | 0.79 |
SRI-WB | 5 items | 59.86 ± 19.96 | 19.44–100.00 | 0.82 |
SRI-AX | 9 items | 64.73 ± 22.42 | 10.00–100.00 | 0.87 |
SRI-SF | 8 items | 57.27 ± 19.39 | 17.85–100.00 | 0.76 |
SRI-SS | 7 scales | 60.98 ± 16.0 | 24.73–99.5 | 0.89 |
External nomological validity
SRI scales | SF-36 Scales | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
PF | RP | BP | GH | VT | SF | RE | MH | MHC | PHC | |
RC | .40 | .40 | .33 | .33 | .40 | .43 | .38 | .33 | ||
PF | .81 | .60 | .19 | .34 | .36 | .6 | .40 | .21 | ||
AS | .31 | .31 | .48 | .46 | .27 | .34 | .38 | .32 | ||
SR | .52 | .55 | .33 | .50 | .33 | .59 | .56 | .47 | ||
AX | .40 | .54 | .25 | .49 | .41 | .48 | .61 | .45 | ||
WB | .48 | .57 | .40 | .55 | .51 | .59 | .57 | .62 | ||
SF | .71 | .64 | .49 | .43 | .38 | .74 | .56 | .35 | ||
SS | .66 | .65 | .44 | .55 | .47 | .68 | .64 | .49 | 0.57 | 0.66 |