Prevalence of Diagnosed Cancer According to Duration of Diagnosed Diabetes and Current Insulin Use Among U.S. Adults With Diagnosed Diabetes: Findings from the 2009 Behavioral Risk Factor Surveillance System

OBJECTIVE: To estimate the prevalence of diagnosed cancer according to duration of diagnosed diabetes and current insulin use among U.S. adults with diagnosed diabetes. RESEARCH DESIGN AND METHODS: We analyzed data from 25,964 adults aged ≥18 years with diagnosed diabetes who participated in the 2009 Behavioral Risk Factor Surveillance System. RESULTS: After adjustment for potential confounders, we found that the greater the duration of diagnosed diabetes, the higher the prevalence of diagnosed cancers (P < 0.0001 for linear trend). Among adults with diagnosed type 2 diabetes, the prevalence estimate for cancers of all sites was significantly higher among men (adjusted prevalence ratio 1.6 [95% CI 1.3–1.9]) and women (1.8 [1.5–2.1]) who reported being diagnosed with diabetes ≥15 years ago than among those reporting diabetes diagnosis <15 years ago. The prevalence estimate for cancers of all sites was ~1.3 times higher among type 2 diabetic adults who currently used insulin than among those who did not use insulin among both men (1.3 [1.1–1.6]) and women (1.3 [1.1–1.5]). CONCLUSIONS: Our results suggest that there is an increased burden of diagnosed cancer among adults with a longer duration of diagnosed diabetes and among type 2 diabetic adults who currently use insulin.