Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes
The purpose of this study was to test the psychometric properties of the Perceived Therapeutic Efficacy Scale (PTES) for type 2 diabetes with a Taiwanese sample. The mortality rate and health care cost of diabetes have dramatically increased in Taiwan, with many people with diabetes lacking the abil...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2008-03-01
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| Series: | Journal of the Formosan Medical Association |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0929664608601412 |
| _version_ | 1818560802626469888 |
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| author | Shu-Fang Vivienne Wu Mary Courtney Helen Edwards Jan McDowell Lillie M. Shortridge-Baggett Pei-Jen Chang |
| author_facet | Shu-Fang Vivienne Wu Mary Courtney Helen Edwards Jan McDowell Lillie M. Shortridge-Baggett Pei-Jen Chang |
| author_sort | Shu-Fang Vivienne Wu |
| collection | DOAJ |
| description | The purpose of this study was to test the psychometric properties of the Perceived Therapeutic Efficacy Scale (PTES) for type 2 diabetes with a Taiwanese sample. The mortality rate and health care cost of diabetes have dramatically increased in Taiwan, with many people with diabetes lacking the ability to control their disease appropriately. Addressing this problem requires enhancing self-efficacy towards self-management. Thus, there is a particular need for research into developing a diabetes-specific self-efficacy measurement instrument in Taiwan.
Methods: This study was undertaken in two stages. Stage 1 consisted of forward and back translation of the PTES into Chinese and examination of content validity. Stage 2 established the validity and reliability of the Chinese version of PTES (C-PTES). A total of 230 people with type 2 diabetes aged 30 years or more from a diabetes outpatient clinic and taking oral medicine were recruited for psychometric testing.
Results: Significant criterion-related validity was demonstrated between the C-PTES and the Summary of Diabetes Self-Care Activities scores (r = 0.32; p < 0.01). Convergent validity was confirmed as the C-PTES converged well with the General Self-Efficacy Scale in measuring self-efficacy (r = 0.42; p < 0.01); construct validity using factor analysis composed a single subscale. Internal consistency showed Cronbach's a was 0.95 and the test-retest reliability (Pearson's correction) was 0.79 (p < 0.01) and a Bland-Altman plot showed that 97% of the subjects were within two standard deviations of the mean.
Conclusion: The results of reliability and validity strengthen confidence in using the C-PTES. The C-PTES requires future studies to confirm the psychometric properties. |
| first_indexed | 2024-12-14T00:42:56Z |
| format | Article |
| id | doaj.art-25f1df477eed4dbca6e7d848d6ed654c |
| institution | Directory Open Access Journal |
| issn | 0929-6646 |
| language | English |
| last_indexed | 2024-12-14T00:42:56Z |
| publishDate | 2008-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of the Formosan Medical Association |
| spelling | doaj.art-25f1df477eed4dbca6e7d848d6ed654c2022-12-21T23:24:15ZengElsevierJournal of the Formosan Medical Association0929-66462008-03-01107323223810.1016/S0929-6646(08)60141-2Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 DiabetesShu-Fang Vivienne Wu0Mary Courtney1Helen Edwards2Jan McDowell3Lillie M. Shortridge-Baggett4Pei-Jen Chang5Faculty of Nursing, National Taipei College of Nursing, Taipei, TaiwanInstitute of Health and Biomedical Innovation and School of Nursing, Queensland University of Technology, Queensland, AustraliaInstitute of Health and Biomedical Innovation and School of Nursing, Queensland University of Technology, Queensland, AustraliaInstitute of Health and Biomedical Innovation and School of Nursing, Queensland University of Technology, Queensland, AustraliaCenter for Nursing Research, Clinical Practice and International Affairs, Lienhard School of Nursing, Pace University, New York, USAFaculty of Nursing, National Taipei College of Nursing, Taipei, TaiwanThe purpose of this study was to test the psychometric properties of the Perceived Therapeutic Efficacy Scale (PTES) for type 2 diabetes with a Taiwanese sample. The mortality rate and health care cost of diabetes have dramatically increased in Taiwan, with many people with diabetes lacking the ability to control their disease appropriately. Addressing this problem requires enhancing self-efficacy towards self-management. Thus, there is a particular need for research into developing a diabetes-specific self-efficacy measurement instrument in Taiwan. Methods: This study was undertaken in two stages. Stage 1 consisted of forward and back translation of the PTES into Chinese and examination of content validity. Stage 2 established the validity and reliability of the Chinese version of PTES (C-PTES). A total of 230 people with type 2 diabetes aged 30 years or more from a diabetes outpatient clinic and taking oral medicine were recruited for psychometric testing. Results: Significant criterion-related validity was demonstrated between the C-PTES and the Summary of Diabetes Self-Care Activities scores (r = 0.32; p < 0.01). Convergent validity was confirmed as the C-PTES converged well with the General Self-Efficacy Scale in measuring self-efficacy (r = 0.42; p < 0.01); construct validity using factor analysis composed a single subscale. Internal consistency showed Cronbach's a was 0.95 and the test-retest reliability (Pearson's correction) was 0.79 (p < 0.01) and a Bland-Altman plot showed that 97% of the subjects were within two standard deviations of the mean. Conclusion: The results of reliability and validity strengthen confidence in using the C-PTES. The C-PTES requires future studies to confirm the psychometric properties.http://www.sciencedirect.com/science/article/pii/S0929664608601412Perceived Therapeutic Efficacy Scalepsychometricsself efficacytype 2 diabetes mellitus |
| spellingShingle | Shu-Fang Vivienne Wu Mary Courtney Helen Edwards Jan McDowell Lillie M. Shortridge-Baggett Pei-Jen Chang Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes Journal of the Formosan Medical Association Perceived Therapeutic Efficacy Scale psychometrics self efficacy type 2 diabetes mellitus |
| title | Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes |
| title_full | Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes |
| title_fullStr | Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes |
| title_full_unstemmed | Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes |
| title_short | Psychometric Properties of the Chinese Version of the Perceived Therapeutic Efficacy Scale for Type 2 Diabetes |
| title_sort | psychometric properties of the chinese version of the perceived therapeutic efficacy scale for type 2 diabetes |
| topic | Perceived Therapeutic Efficacy Scale psychometrics self efficacy type 2 diabetes mellitus |
| url | http://www.sciencedirect.com/science/article/pii/S0929664608601412 |
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