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. 2016 Apr 5;6:24071. doi: 10.1038/srep24071

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Meta-analysis on HbA_1c and cancer mortality in (a) subjects without known diabetes, (b) those without diabetes, and (c) those with normal HbA_1c range. The squares represent the hazard ratio per 1% increase in HbA_1c level for each individual study, with the area reflecting the weight assigned to the study. The horizontal line across each square represents the 95% confidence interval. The diamond represents the summary hazard ratio per 1% increase in HbA_1c level, with width representing 95% confidence interval.