Estimating the impact of changes in HbA(1c), body weight and insulin injection regimen on health related quality-of-life : a time trade off study

• Background: There are limited data on the potential short-term benefits associated with reductions in HbA(1c) levels, and understanding any immediate improvements in health related quality-of-life (HRQoL) through better glycaemic control may help inform diabetes management decisions. This time-trade-off (TTO) study investigated the short-term impact on HRQoL associated with three different aspects of diabetes management; HbA(1c) change, body weight change, and the complexity of treatment regimen.Methods: The study was designed in three stages: Stage 1) Qualitative telephone interviews with people with type 2 diabetes (T2D) in Denmark who had experienced a decrease in their HbA(1c) level. Stage 2) A validation survey with people with T2D in Denmark to obtain quantifiable knowledge on the short-term effects of a change in HbA(1c) levels. Stage 3) TTO survey using health states based on results from stage 2. Respondents were either adults with T2D (Sweden) or from the general public (UK and Denmark) and were separately asked to evaluate seven health states through an internet-based survey.Results: Results from 4060 respondents were available for the TTO analysis (UK n = 1777; Denmark n = 1799, Sweden n = 484). 'Well-controlled diabetes' was associated with utilities of 0.85-0.91 and 'not well-controlled diabetes' with utilities of 0.71-0.80 in all countries. Difference in utilities per HbA(1c) percentage point was smallest in Sweden and largest in Denmark (between 0.025-0.034 per HbA(1c) percentage point respectively). The treatment management health state associated with the lowest disutility was the once-daily insulin regimen. The disutility associated with per kg of weight change ranged from 0.0041-0.0073.Conclusions: Changes in HbA(1c) levels, insulin regimen and body weight are all likely to affect HRQoL for patients with T2D. A change in HbA(1c) is likely to have a short-term impact in addition to the effect on the development of long term diabetes complications. A treatment which has a simple regimen with fewer injections, and/or the need for less planning, and that causes weight loss or less weight gain, compared with other treatments, will have a positive impact on HRQoL.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)

Nyckelord

Time trade off study

Health related quality of life

HbA1c level

Body weight

Insulin injection regimen

Type 2 diabetes

Utility values

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