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Psychometric evaluation of the Persian version of the Type 2 Diabetes and Health Promotion Scale (T2DHPS): a diabetes-specific measure of lifestyle.

Publication ,  Journal Article
Saffari, M; Karimi, T; Koenig, HG; Al-Zaben, F
Published in: Scand J Caring Sci
September 2015

BACKGROUND: A healthy lifestyle is important for maintaining health and preventing complications in patients with type 2 diabetes, and yet, few instruments are available to measure this. AIM: The aim of the present study was to examine the psychometrics of a recently developed tool that can be used to screen for a health-promoting lifestyle in patients with type 2 diabetes. METHODS: Data were collected from outpatients attending diabetes clinics. The Type 2 Diabetes and Health Promotion Scale (T2DHPS), EQ-5D, medical records and a demographic questionnaire were administered to 368 participants. Forward-backward translation of the original English version was used to develop a Persian version. Internal consistency of the scale was assessed by Cronbach's alpha and item-to-total correlation. Acceptability was measured by assessing floor and ceiling effects for each item and subscale. The item scaling test was used to examine the convergent and discriminant validity of the measure. Pearson correlation was used to determine the predictive validity of the scale. An explanatory factor analysis and known-group method were used to establish construct validity. RESULTS: Adjusted item-total correlations were higher than 0.20. Cronbach's alpha for the 28-item scale was 0.88 and for subscales ranged from 0.53 to 0.94. Correlations between the total score and subscale scores were significant (<0.01) and adequate (r's ≥ 0.53). There were significant relationships between the T2DHPS and both the EQ-5D and indicators of glycaemic control. Convergent and discriminant validity of the scale was established. Significant differences in lifestyle dimensions were present between different groups of patients, demonstrating known-group validity. A six-factor solution was obtained that explained 54.6% of the total variance. CONCLUSION: The T2DHPS is a valid and reliable tool for investigating lifestyle behaviours in patients with type 2 diabetes. Further studies to establish the psychometric properties of the scale in other languages and cultures are suggested.

Duke Scholars

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Published In

Scand J Caring Sci

DOI

EISSN

1471-6712

Publication Date

September 2015

Volume

29

Issue

3

Start / End Page

603 / 612

Location

Sweden

Related Subject Headings

  • Translations
  • Translating
  • Reproducibility of Results
  • Quality of Life
  • Psychometrics
  • Outpatients
  • Nursing
  • Middle Aged
  • Male
  • Life Style
 

Citation

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Saffari, M., Karimi, T., Koenig, H. G., & Al-Zaben, F. (2015). Psychometric evaluation of the Persian version of the Type 2 Diabetes and Health Promotion Scale (T2DHPS): a diabetes-specific measure of lifestyle. Scand J Caring Sci, 29(3), 603–612. https://doi.org/10.1111/scs.12181
Saffari, Mohsen, Tooba Karimi, Harold G. Koenig, and Faten Al-Zaben. “Psychometric evaluation of the Persian version of the Type 2 Diabetes and Health Promotion Scale (T2DHPS): a diabetes-specific measure of lifestyle.Scand J Caring Sci 29, no. 3 (September 2015): 603–12. https://doi.org/10.1111/scs.12181.
Saffari, Mohsen, et al. “Psychometric evaluation of the Persian version of the Type 2 Diabetes and Health Promotion Scale (T2DHPS): a diabetes-specific measure of lifestyle.Scand J Caring Sci, vol. 29, no. 3, Sept. 2015, pp. 603–12. Pubmed, doi:10.1111/scs.12181.
Journal cover image

Published In

Scand J Caring Sci

DOI

EISSN

1471-6712

Publication Date

September 2015

Volume

29

Issue

3

Start / End Page

603 / 612

Location

Sweden

Related Subject Headings

  • Translations
  • Translating
  • Reproducibility of Results
  • Quality of Life
  • Psychometrics
  • Outpatients
  • Nursing
  • Middle Aged
  • Male
  • Life Style