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Combined randomised controlled trial experience of malignancies in studies using insulin glargine

Lookup NU author(s): Emeritus Professor Philip Home

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Abstract

Recent publications of data extracted from population registries have suggested a possible relationship between treatment with insulin glargine and increased incidence of cancer/breast cancer. The aim of the present study was investigate this possible relationship using data from the manufacturer's (sanofi-aventis) pharmacovigilance database. We analysed the manufacturer's (sanofi-aventis) pharmacovigilance database for all randomised clinical trials (RCTs; Phase 2-4) comparing insulin glargine with any comparator in type 1 or type 2 diabetes. We identified all serious adverse events coded under the System Organ Class of 'neoplasms, benign, malignant and unspecified'. Treatment-emergent neoplasms judged to be malignant were included in this analysis. The database included 31 studies, 12 in type 1 diabetes and 19 in type 2 diabetes. Twenty compared insulin glargine with NPH insulin, 29 were parallel-group studies and two had a crossover design. Studies were generally of 6 months' duration, except for trial reference number 4016 (n = 1,017), which had a duration of 5 years. Overall, 10,880 people were included in the analysis (insulin glargine, 5,657; comparator, 5,223). Forty-five people (0.8%) vs 46 people (0.9%) reported 52 and 48 cases of malignant cancer in the insulin glargine and comparator groups, respectively (RR 0.90, 95% CI 0.60-1.36). Skin (12 people with 16 events vs six people with seven events, RR 1.85, 95% CI 0.69-4.92), colon and rectum (six vs ten people, RR 0.55, 95% CI 0.20-1.52), breast (four vs six people, RR 0.62, 95% CI 0.17-2.18) and gastrointestinal tract (six vs four people, RR 1.38, 95% CI 0.39-4.90) were the most commonly reported sites. In these 31 RCTs, insulin glargine was not associated with an increased incidence of cancer, including breast cancer, compared with the comparator group.


Publication metadata

Author(s): Home PD, Lagarenne P

Publication type: Article

Publication status: Published

Journal: Diabetologia

Year: 2009

Volume: 52

Issue: 12

Pages: 2499-2506

ISSN (print): 0012-186X

ISSN (electronic): 1432-0428

Publisher: Springer

URL: http://dx.doi.org/10.1007/s00125-009-1530-5

DOI: 10.1007/s00125-009-1530-5


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