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Adherence to insulin and its association with glycaemic control in patients with type 2 diabetes

Citation
Donnelly LA, Morris AD & Evans J (2007) Adherence to insulin and its association with glycaemic control in patients with type 2 diabetes, QJM, 100 (6), pp. 345-350.

Abstract

Background: Good glycaemic control improves outcomes in patients with type 2 diabetes, but the extent to which this depends on adherence to insulin treatment is uncertain.

Aim: To investigate the association between adherence to insulin and glycaemic control in insulintreated patients with type 2 diabetes.

Design: Observational records-based study.

Methods: We studied all patients with type 2 diabetes who were resident in Tayside, Scotland from 1 January 1995 to 30 September 2001, and who were treated with insulin. Adherence to insulin treatment was measured as the annual number of days of insulin coverage on the recommended dose, calculated from the amount of drug dispensed at community pharmacies and the recommended dose level for each patient. The association between glycaemic control (HbA1c), and adherence was determined, as was the influence of covariates, including age, sex, duration of diabetes and number of injections per day.

Results: A total of 1099 people were studied: 574 (52%) males and 525 (48%) females, meanSD age 6212 years, diabetes duration 107 years. Median time in the study (time for which insulin was dispensed) was 1107 (range 366-2446) days. Insulin prescribed was 58.033.3 IU/day and insulin collected from pharmacies was 53.627.1 IU/day. Mean adherence to insulin was thus 70.6%17.7%. Adherence to insulin (p=0.0021), BMI (p=0.0001) and diabetes duration (p=0.0314) were all significant predictors of HbA1c.

Discussion: Adherence to insulin appears poor in these type 2 diabetes patients, and there was a significant relationship between adherence and long-term metabolic control.

Subject headings
Non-insulin-dependent diabetes; Diabetes Mellitus, Type 2

StatusPublished
AuthorsDonnelly Louise A, Morris Andrew D, Evans Josie
Publication date06/2007
Publication date online15/05/2007
PublisherOxford University Press for the Association of Physicians of Great Britain and Ireland
ISSN 1460-2725
LanguageEnglish

Journal
qjm: Volume 100, Issue 6 (06/2007)

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