Abstract
Objective
To examine the reliability and validity of the Chinese version of the 19-item Audit of Diabetes-Dependent Quality of Life for Taiwan (ADDQoL-CnTW).
Methods
Linguistic validation procedures for patient-reported outcome measures were used to translate the Taiwan version from the original 19-item UK-English ADDQoL. The psychometric properties of the ADDQoL-CnTW were evaluated in a convenience sample, recruited from outpatient facilities, of 260 patients diagnosed with diabetes mellitus.
Results
The forced one-factor solution supported one general 19-item factor with all items loading above 0.43, accounting for 51.5% of the variance, although the results of confirmatory factory analysis did not strictly adhere to a one-factor structure. Using Kaiser's Criterion, exploratory factor analysis identified four sub-dimensions but the pattern of loading also confirmed the presence of a large general factor with 11 of 19 items loading ≥0.4 on the first component, accounting for 49.73% of the variance. Internal consistency for the entire scale was 0.94. Convergent and discriminant validity were suggested by a stronger correlation of average weighted impact (AWI) scores with the overview Diabetes-specific QoL item than with the Present QoL item. The Present QoL item correlated better with the World Health Organization Quality of Life-BREF(TW) dimension scores than the Diabetes-specific QoL scores or the AWI scores. Insulin-treated patients reported significantly more negative AWI scores and Diabetes-specific QoL scores than those treated with tablets and/or diet, demonstrating known-groups validity.
Conclusions
The ADDQoL-CnTW revealed excellent internal consistency reliability, and showed evidence of validity for use in Taiwanese people with diabetes.
To examine the reliability and validity of the Chinese version of the 19-item Audit of Diabetes-Dependent Quality of Life for Taiwan (ADDQoL-CnTW).
Methods
Linguistic validation procedures for patient-reported outcome measures were used to translate the Taiwan version from the original 19-item UK-English ADDQoL. The psychometric properties of the ADDQoL-CnTW were evaluated in a convenience sample, recruited from outpatient facilities, of 260 patients diagnosed with diabetes mellitus.
Results
The forced one-factor solution supported one general 19-item factor with all items loading above 0.43, accounting for 51.5% of the variance, although the results of confirmatory factory analysis did not strictly adhere to a one-factor structure. Using Kaiser's Criterion, exploratory factor analysis identified four sub-dimensions but the pattern of loading also confirmed the presence of a large general factor with 11 of 19 items loading ≥0.4 on the first component, accounting for 49.73% of the variance. Internal consistency for the entire scale was 0.94. Convergent and discriminant validity were suggested by a stronger correlation of average weighted impact (AWI) scores with the overview Diabetes-specific QoL item than with the Present QoL item. The Present QoL item correlated better with the World Health Organization Quality of Life-BREF(TW) dimension scores than the Diabetes-specific QoL scores or the AWI scores. Insulin-treated patients reported significantly more negative AWI scores and Diabetes-specific QoL scores than those treated with tablets and/or diet, demonstrating known-groups validity.
Conclusions
The ADDQoL-CnTW revealed excellent internal consistency reliability, and showed evidence of validity for use in Taiwanese people with diabetes.
| Original language | English |
|---|---|
| Pages (from-to) | 335-342 |
| Number of pages | 8 |
| Journal | International Journal for Quality in Health Care |
| Volume | 29 |
| Issue number | 3 |
| Early online date | 28 Mar 2017 |
| DOIs | |
| Publication status | Published - 1 Jun 2017 |
