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Systematic review and economic evaluation of a long-acting insulin analogue, insulin glargine

Warren, E., Weatherley Jones, E., Chilcott, J. and Beverley, C. (2004) Systematic review and economic evaluation of a long-acting insulin analogue, insulin glargine. Technical Report. Gray Publishing , Tunbridge Wells.

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Published Version: http://www.hta.ac.uk/1298

Abstract

Objectives:

To evaluate the use of insulin glargine in its licensed basal-bolus indication in terms of both clinical and cost-effectiveness.

Data sources:

Electronic databases.

Review methods:

A systematic review of the literature, involving a range of databases, was performed to identify all papers relating to insulin glargine.

Results:

Nineteen studies met the inclusion criteria but full reports were available for only six. For type 1 diabetes patients, insulin glargine appears to be more effective than neutral protamine Hagedorn (NPH) in reducing fasting blood glucose (FBG) but not in reducing glycosylated haemoglobin (HbA1c) and there is some evidence that both insulins are as effective as each other in both FBG and HbA1c control. For type 2 patients for whom oral antidiabetic agents provide inadequate glycaemic control, there is no evidence that insulin glargine is more effective than NPH in reducing either FBG or HbA1c and some evidence that both insulins are as effective as each other in both FBG and HbA1c control. Evidence for control of hypoglycaemia is equivocal. In studies where insulin glargine is demonstrated to be superior to NPH in controlling nocturnal hypoglycaemia, this may be only apparent when compared with once-daily NPH and not twicedaily NPH. Further, this superiority of glargine over NPH in the control of nocturnal hypoglycaemia may relate to one formulation of insulin glargine (HOE901[80]) and not another (HOE901[30]). There is no conclusive evidence that insulin glargine is superior to NPH in controlling symptomatic hypoglycaemia and severe hypoglycaemia. Insufficient data are available to conclude whether insulin glargine is different from each of the commonly used NPH dosing regimens: once daily and more than once daily. Given the lack of a published evidence base for the cost-effectiveness of insulin glargine, the economic review concentrates on a review of the industry submission and an amended model. Three economic models are provided in the submission, two relating to type 1 diabetes and one relating to type 2 diabetes. All three models compare the cost–utility of insulin glargine against NPH insulin. In general, the structures of the models are poor and in all three models, mistakes relating to assumptions and calculations have been made. The assessment team believe that the cost per QALY estimates generated by the Aventis model may be an underestimate for several reasons. The costeffectiveness of insulin glargine in both type 1 and type 2 diabetes is highly sensitive to the amount of utility associated with reducing the fear of hypoglycaemia.

Conclusions:

The evidence suggests that, compared with NPH insulin, insulin glargine is effective in reducing the number of nocturnal hypoglycaemic episodes, especially when compared with once-daily NPH. There appears to be no improvement in long-term glycaemic control and therefore insulin glargine is unlikely to reduce the incidence of the long-term microvascular and cardiovascular complications of diabetes. Further research into insulin glargine is needed that addresses the quality of life issues associated with fear of hypoglycaemia and also the economic impact of balance of HbA1c control and incidence of hypoglycaemia achieved in practice. Studies examining the economic evidence on insulin glargine should be published.

Item Type: Monograph (Technical Report)
Copyright, Publisher and Additional Information: Copyright: Queen’s Printer and Controller of HMSO 2004 HTA reports may be freely reproduced for the purposes of private research and study and may be included in professional journals provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Violations should be reported to hta@soton.ac.uk Applications for commercial reproduction should be addressed to HMSO, The Copyright Unit, St Clements House, 2-16 Colegate, Norwich, NR3 1BQ
Keywords: Diabetes mellitus Insulin analogue Insulin glargine Quality of life Systematic review Economic evaluation Cost benefit analysis
Academic Units: The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > School of Health and Related Research (Sheffield)
Depositing User: Diana Papaioannou
Date Deposited: 07 Dec 2006
Last Modified: 08 Feb 2013 16:50
Published Version: http://www.hta.ac.uk/1298
Status: Published
Publisher: Gray Publishing
Identification Number: ISSN 1366-5278
URI: http://eprints.whiterose.ac.uk/id/eprint/1796

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