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21-06-2015 | Uitgave 12/2015

Quality of Life Research 12/2015

Assessing the impact of non-severe hypoglycemic events and treatment in adults: development of the Treatment-Related Impact Measure—Non-severe Hypoglycemic Events (TRIM-HYPO)

Tijdschrift:
Quality of Life Research > Uitgave 12/2015
Auteurs:
Meryl Brod, Lise Højbjerre, Donald M. Bushnell, Charlotte Thim Hansen

Abstract

Purpose

Non-severe hypoglycemic events (NSHEs) are commonly experienced by diabetes patients, particularly among insulin users, and can have serious impacts on daily functioning, emotional well-being, sleep, work productivity, and treatment adherence. Currently, no PRO measures are available to assess the impacts of non-severe hypoglycemia. To address this gap, the Treatment-Related Impact Measure-Non-severe Hypoglycemic Events (TRIM-HYPO) was developed. This paper describes the TRIM-HYPO development and validation.

Methods

The creation of the TRIM-HYPO followed FDA’s guideline for PRO development. Concept elicitation data were gathered from literature review, clinical expert interviews, and focus groups of patients with Type 1 or 2 diabetes in four countries. Based on the qualitative analysis, draft items were generated and cognitively debriefed. Psychometric validation included factor analysis, item response theory analysis, and assessment of psychometric characteristics for the TRIM-HYPO.

Results

Eight clinical experts and 167 patients participated in concept elicitation. The validation study included 407 patients. Thirteen of the 46 items from the preliminary measure were dropped due to ceiling/floor effects and high correlations between conceptually similar items. Factor analysis confirmed five domains in the TRIM-HYPO: daily function, emotional well-being, diabetes management, sleep disruption, and work productivity. All scores were internally consistent (0.86–0.95) and reproducible with a test–retest range of 0.75–0.98. All but one a priori hypothesized associations for validity were confirmed.

Conclusions

Study findings demonstrate that the final, 33-item TRIM-HYPO is reliable and valid and may be useful for assessing impacts related to NSHEs in research and clinical practice.

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