Cancer Risk in Diabetic Patients Treated with Metformin: A Systematic Review and Meta-analysis
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{"title"=>"Cancer risk in diabetic patients treated with metformin: A systematic review and meta-analysis", "type"=>"journal", "authors"=>[{"first_name"=>"Hiroshi", "last_name"=>"Noto", "scopus_author_id"=>"36180198400"}, {"first_name"=>"Atsushi", "last_name"=>"Goto", "scopus_author_id"=>"36339255500"}, {"first_name"=>"Tetsuro", "last_name"=>"Tsujimoto", "scopus_author_id"=>"36599449600"}, {"first_name"=>"Mitsuhiko", "last_name"=>"Noda", "scopus_author_id"=>"7402801468"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"364479968", "sgr"=>"84858695046", "issn"=>"19326203", "pmid"=>"22448244", "scopus"=>"2-s2.0-84858695046", "doi"=>"10.1371/journal.pone.0033411", "isbn"=>"1932-6203"}, "id"=>"b8af4d93-a132-33ad-9d53-0193d767f4ee", "abstract"=>"BACKGROUND: A growing body of evidence has suggested that metformin potentially reduces the risk of cancer. Our objective was to enhance the precision of estimates of the effect of metformin on the risk of any-site and site-specific cancers in patients with diabetes.\\n\\nMETHODS/PRINCIPAL FINDINGS: We performed a search of MEDLINE, EMBASE, ISI Web of Science, Cochrane Library, and ClinicalTrials.gov for pertinent articles published as of October 12, 2011, and included them in a systematic review and meta-analysis. We calculated pooled risk ratios (RRs) for overall cancer mortality and cancer incidence. Of the 21,195 diabetic patients reported in 6 studies (4 cohort studies, 2 RCTs), 991 (4.5%) cases of death from cancer were reported. A total of 11,117 (5.3%) cases of incident cancer at any site were reported among 210,892 patients in 10 studies (2 RCTs, 6 cohort studies, 2 case-control studies). The risks of cancer among metformin users were significantly lower than those among non-metformin users: the pooled RRs (95% confidence interval) were 0.66 (0.49-0.88) for cancer mortality, 0.67 (0.53-0.85) for all-cancer incidence, 0.68 (0.53-0.88) for colorectal cancer (n = 6), 0.20 (0.07-0.59) for hepatocellular cancer (n = 4), 0.67 (0.45-0.99) for lung cancer (n = 3).\\n\\nCONCLUSION/SIGNIFICANCE: The use of metformin in diabetic patients was associated with significantly lower risks of cancer mortality and incidence. However, this analysis is mainly based on observational studies and our findings underscore the more need for long-term RCTs to confirm this potential benefit for individuals with diabetes.", "link"=>"http://www.mendeley.com/research/cancer-risk-diabetic-patients-treated-metformin-systematic-review-metaanalysis-1", "reader_count"=>153, "reader_count_by_academic_status"=>{"Unspecified"=>5, "Professor > Associate Professor"=>5, "Librarian"=>3, "Researcher"=>23, "Student > Doctoral Student"=>14, "Student > Ph. D. Student"=>31, "Student > Postgraduate"=>11, "Other"=>11, "Student > Master"=>24, "Student > Bachelor"=>19, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>3, "Professor"=>2}, "reader_count_by_user_role"=>{"Unspecified"=>5, "Professor > Associate Professor"=>5, "Librarian"=>3, "Researcher"=>23, "Student > Doctoral Student"=>14, "Student > Ph. D. Student"=>31, "Student > Postgraduate"=>11, "Other"=>11, "Student > Master"=>24, "Student > Bachelor"=>19, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>3, "Professor"=>2}, "reader_count_by_subject_area"=>{"Unspecified"=>11, "Agricultural and Biological Sciences"=>27, "Philosophy"=>2, "Business, Management and Accounting"=>1, "Chemistry"=>3, "Computer Science"=>1, "Decision Sciences"=>1, "Engineering"=>3, "Environmental Science"=>3, "Biochemistry, Genetics and Molecular Biology"=>15, "Medicine and Dentistry"=>77, "Pharmacology, Toxicology and Pharmaceutical Science"=>3, "Social Sciences"=>4, "Immunology and Microbiology"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>77}, "Social Sciences"=>{"Social Sciences"=>4}, "Decision Sciences"=>{"Decision Sciences"=>1}, "Unspecified"=>{"Unspecified"=>11}, "Environmental Science"=>{"Environmental Science"=>3}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>3}, "Engineering"=>{"Engineering"=>3}, "Chemistry"=>{"Chemistry"=>3}, "Immunology and Microbiology"=>{"Immunology and Microbiology"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>27}, "Computer Science"=>{"Computer Science"=>1}, "Business, Management and Accounting"=>{"Business, Management and Accounting"=>1}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>15}, "Philosophy"=>{"Philosophy"=>2}}, "reader_count_by_country"=>{"Canada"=>2, "United States"=>2, "China"=>1, "Japan"=>2, "Brazil"=>2, "United Kingdom"=>2, "Italy"=>1, "South Africa"=>1, "Mexico"=>1, "Portugal"=>1}, "group_count"=>10}

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PMC Usage Stats | Further Information

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Relative Metric

{"start_date"=>"2012-01-01T00:00:00Z", "end_date"=>"2012-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Medicine and health sciences/Metabolic disorders", "average_usage"=>[329, 565, 687, 799, 892, 997, 1113, 1208, 1308, 1395, 1473, 1546, 1623, 1690, 1762, 1828, 1893, 1960, 2030, 2087, 2146, 2207, 2272, 2319, 2370]}, {"subject_area"=>"/Medicine and health sciences/Oncology", "average_usage"=>[301, 551, 686, 790, 883, 972, 1069, 1162, 1250, 1341, 1426, 1503, 1571, 1634, 1701, 1779, 1848, 1919, 1986, 2052, 2114, 2183, 2253, 2301, 2367]}, {"subject_area"=>"/Physical sciences/Mathematics", "average_usage"=>[325, 522, 627, 718, 804, 884, 969, 1052, 1131, 1207, 1277, 1346, 1415, 1478, 1542, 1605, 1663, 1723, 1776, 1839, 1895, 1955, 2008, 2066, 2123]}]}
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