Premium
Psychometric evaluation of the P ersian version of the T ype 2 D iabetes and H ealth P romotion S cale ( T 2 DHPS ): a diabetes‐specific measure of lifestyle
Author(s) -
Saffari Mohsen,
Karimi Tooba,
Koenig Harold G.,
AlZaben Faten
Publication year - 2015
Publication title -
scandinavian journal of caring sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.678
H-Index - 66
eISSN - 1471-6712
pISSN - 0283-9318
DOI - 10.1111/scs.12181
Subject(s) - psychology , correlation , medicine , type 2 diabetes , gerontology , diabetes mellitus , mathematics , endocrinology , geometry
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 T ype 2 D iabetes and H ealth P romotion S cale ( T 2 DHPS ), EQ ‐5 D , medical records and a demographic questionnaire were administered to 368 participants. Forward–backward translation of the original E nglish version was used to develop a Persian version. Internal consistency of the scale was assessed by C ronbach'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. C ronbach'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 T 2 DHPS and both the EQ ‐5 D 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 T 2 DHPS 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.