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Effectiveness and safety of metformin in 51 675 patients with type 2 diabetes and different levels of renal function: a cohort study from the Swedish National Diabetes Register
Vise andre og tillknytning
2012 (engelsk)Inngår i: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 2, nr 4, s. e001076-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

OBJECTIVE

To evaluate the effectiveness and safety of metformin use in clinical practice in a large sample of pharmacologically treated patients with type 2 diabetes and different levels of renal function.

DESIGN

Observational study between July 2004 and December 2010, mean follow-up 3.9 years.

SETTING

Hospital outpatient clinics and primary care in Sweden.

PARTICIPANTS

51 675 men and women with type 2 diabetes, registered in the Swedish National Diabetes Register, and on continuous glucose-lowering treatment with oral hypoglycaemic agents (OHAs) or insulin.

MAIN OUTCOME MEASURES

Risks of cardiovascular disease (CVD), all-cause mortality and acidosis/serious infection, associated with each treatment regimens, were analysed in all patients and in subgroups with different estimated glomerular filtration rate (eGFR) intervals. Covariance adjustment and propensity scores were used to adjust for several baseline risk factors and characteristics at Cox regression.

RESULTS

Compared with metformin in monotherapy, HRs for fatal/non-fatal CVD and all-cause mortality with all other OHAs combined (approximately 80% sulphonylureas) in monotherapy were 1.02 (95% CI 0.93 to 1.12) and 1.13 (1.01 to 1.27), while 1.18 (1.07 to 1.29) and 1.34 (1.19 to 1.50) with insulin in monotherapy, adjusting using propensity scores. Metformin, compared with any other treatment, showed reduced risks of acidosis/serious infection (adjusted HR 0.85, 95% CI 0.74 to 0.97) and all-cause mortality (HR 0.87, 95% CI 0.77 to 0.99), in patients with eGFR 45-60 ml/min/1.73 m(2), and no increased risks of all-cause mortality, acidosis/serious infection or CVD were found in patients with eGFR 30-45 ml/min/1.73 m(2).

CONCLUSIONS

Metformin showed lower risk than insulin for CVD and all-cause mortality and slightly lower risk for all-cause mortality compared with other OHA, in these 51 675 patients followed for 4 years. Patients with renal impairment showed no increased risk of CVD, all-cause mortality or acidosis/serious infection. In clinical practice, the benefits of metformin use clearly outbalance the risk of severe side effects.

sted, utgiver, år, opplag, sider
2012. Vol. 2, nr 4, s. e001076-
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Identifikatorer
URN: urn:nbn:se:uu:diva-189527DOI: 10.1136/bmjopen-2012-001076ISI: 000315049300052PubMedID: 22798258OAI: oai:DiVA.org:uu-189527DiVA, id: diva2:581762
Tilgjengelig fra: 2013-01-02 Laget: 2013-01-02 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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