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Development and validation of the Diabetes Medication System Rating Questionnaire‐Short Form
Author(s) -
Peyrot M.,
Xu Y.,
Rubin R. R.
Publication year - 2014
Publication title -
diabetic medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.474
H-Index - 145
eISSN - 1464-5491
pISSN - 0742-3071
DOI - 10.1111/dme.12453
Subject(s) - medicine , rating scale , diabetes mellitus , patient satisfaction , physical therapy , type 2 diabetes , questionnaire , reliability (semiconductor) , psychology , surgery , statistics , developmental psychology , power (physics) , physics , mathematics , quantum mechanics , endocrinology
Aims To develop and validate a short form of the 54‐item Diabetes Medication System Rating Questionnaire that maintains the domains and performance characteristics of the long‐form questionnaire. Methods Data from the Diabetes Medication System Rating Questionnaire validation study were analysed to select items representing the nine scales (convenience, negative events, interference, self‐monitoring of blood glucose burden, efficacy, social burden, psychological well‐being, treatment satisfaction and treatment preference). The resulting 20‐item Diabetes Medication System Rating Questionnaire Short‐Form was administered online, with validated criterion measures of treatment satisfaction and medication adherence, with a retest within 2 weeks. Participants were US adults ( N = 413) with Type 2 diabetes using oral agents alone; insulin by syringe and/or pen with or without oral agents; or glucagon‐like peptide‐1 agents. Most participants (82%) completed the retest. Results The median inter‐item agreement of scales was 0.76 and the total composite (mean of all items except treatment preference) was 0.88. The median test‐retest reliability of scales was 0.86, and of the total composite was 0.95. All statistically significant correlations between Diabetes Medication System Rating Questionnaire Short‐Form scales and criterion measures of treatment satisfaction and adherence were in the expected direction. The median correlation of the Diabetes Medication System Rating Questionnaire Short‐Form with corresponding criterion measures of treatment satisfaction was 0.59; the mean correlation of the same Diabetes Medication System Rating Questionnaire Short‐Form measures with adherence was 0.42. The Diabetes Medication System Rating Questionnaire Short‐Form scales were more powerful predictors of adherence than were the criterion measures of treatment satisfaction. The Diabetes Medication System Rating Questionnaire Short‐Form scales differentiated between those taking different medications and between those using different insulin delivery devices. Conclusions This study suggests that the Diabetes Medication System Rating Questionnaire Short‐Form provides a comprehensive set of measures with acceptable reliability and validity and a reduced burden of administration.