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Article: Cancer incidence and mortality in patients with type 2 diabetes treated with human insulin: a cohort study in Shanghai

TitleCancer incidence and mortality in patients with type 2 diabetes treated with human insulin: a cohort study in Shanghai
Authors
Issue Date2013
PublisherPLoS One. The Journal's web site is located at http://www.plosone.org/home.action
Citation
PLoS One, 2013, v. 8 How to Cite?
AbstractAim The aim was to investigate the association between human insulin and cancer incidence and mortality in Chinese patients with type 2 diabetes. Methods We recruited 8,774 insulin-naïve diabetes patients from the Shanghai Diabetes Registry (SDR). The follow-up rate was 85.4%. All subjects were divided into the insulin use cohort (n = 3,639) and the non-insulin use cohort (n = 5,135). The primary outcome was the first diagnosis of any cancer. The secondary outcome was all-cause mortality. Cox proportional hazards model was used to estimate the relative risk (RR) of cancer and mortality. Results We observed 98 cancer events in the insulin use cohort and 170 in the non-insulin use cohort. Cancer incidence rates were 78.6 and 74.3 per 10,000 patients per year in the insulin users and the non-insulin users, respectively. No significant difference in cancer risk was observed between the two cohorts (adjusted RR = 1.20, 95% CI 0.89–1.62, P = 0.228). Regarding site-specific cancers, only the risk of liver cancer was significantly higher in the insulin users compared to that in the non-insulin users (adjusted RR = 2.84, 95% CI 1.12–7.17, P = 0.028). The risks of overall mortality (adjusted RR = 1.89, 95% CI 1.47–2.43, P<0.0001) and death from cancer (adjusted RR = 2.16, 95% CI 1.39–3.35, P = 0.001) were all significantly higher in the insulin users than in the non-insulin users. Conclusion There was no excess risk of overall cancer in patients with type 2 diabetes who were treated with human insulin. However, a significantly higher risk of liver cancer was found in these patients. Moreover, insulin users showed higher risks of overall and cancer mortality. Considering that individuals treated with insulin were more likely to be advanced diabetic patients, caution should be used in interpreting these results.
Persistent Identifierhttp://hdl.handle.net/10722/184819
PubMed Central ID

 

DC FieldValueLanguage
dc.contributor.authorGu, Yen_US
dc.contributor.authorWang, Cen_US
dc.contributor.authorZhang, Yen_US
dc.contributor.authorHou, Xen_US
dc.contributor.authorMo, Yen_US
dc.contributor.authorYu, Wen_US
dc.contributor.authorZhang, Len_US
dc.contributor.authorHu, Cen_US
dc.contributor.authorNan, Hen_US
dc.contributor.authorChen, Len_US
dc.contributor.authorLi, Jen_US
dc.contributor.authorLiu, Yen_US
dc.contributor.authorHuang, Zen_US
dc.contributor.authorHan, Men_US
dc.contributor.authorBao, Yen_US
dc.contributor.authorZhong, Wen_US
dc.contributor.authorJia, Wen_US
dc.date.accessioned2013-07-15T10:10:25Z-
dc.date.available2013-07-15T10:10:25Z-
dc.date.issued2013en_US
dc.identifier.citationPLoS One, 2013, v. 8en_US
dc.identifier.urihttp://hdl.handle.net/10722/184819-
dc.description.abstractAim The aim was to investigate the association between human insulin and cancer incidence and mortality in Chinese patients with type 2 diabetes. Methods We recruited 8,774 insulin-naïve diabetes patients from the Shanghai Diabetes Registry (SDR). The follow-up rate was 85.4%. All subjects were divided into the insulin use cohort (n = 3,639) and the non-insulin use cohort (n = 5,135). The primary outcome was the first diagnosis of any cancer. The secondary outcome was all-cause mortality. Cox proportional hazards model was used to estimate the relative risk (RR) of cancer and mortality. Results We observed 98 cancer events in the insulin use cohort and 170 in the non-insulin use cohort. Cancer incidence rates were 78.6 and 74.3 per 10,000 patients per year in the insulin users and the non-insulin users, respectively. No significant difference in cancer risk was observed between the two cohorts (adjusted RR = 1.20, 95% CI 0.89–1.62, P = 0.228). Regarding site-specific cancers, only the risk of liver cancer was significantly higher in the insulin users compared to that in the non-insulin users (adjusted RR = 2.84, 95% CI 1.12–7.17, P = 0.028). The risks of overall mortality (adjusted RR = 1.89, 95% CI 1.47–2.43, P<0.0001) and death from cancer (adjusted RR = 2.16, 95% CI 1.39–3.35, P = 0.001) were all significantly higher in the insulin users than in the non-insulin users. Conclusion There was no excess risk of overall cancer in patients with type 2 diabetes who were treated with human insulin. However, a significantly higher risk of liver cancer was found in these patients. Moreover, insulin users showed higher risks of overall and cancer mortality. Considering that individuals treated with insulin were more likely to be advanced diabetic patients, caution should be used in interpreting these results.-
dc.languageengen_US
dc.publisherPLoS One. The Journal's web site is located at http://www.plosone.org/home.actionen_US
dc.relation.ispartofPLoS Oneen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleCancer incidence and mortality in patients with type 2 diabetes treated with human insulin: a cohort study in Shanghaien_US
dc.typeArticleen_US
dc.identifier.emailNan, H: hnan@hku.hken_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1371/journal.pone.0053411-
dc.identifier.pmcidPMC3538755-
dc.identifier.hkuros215739en_US
dc.identifier.volume8en_US

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