Abstract

National guidelines recommend that all adults over the age of 40 years undergo screening for diabetes at least once every 3-years. We examined the adherence to these guidelines among males and females after accounting for age, urban/rural residence, and material deprivation. We also examined the incidence of prediabetes and diabetes in adherent and non-adherent individuals. Our study is based on a retrospective population-level inception cohort of adults aged 40-79 years without pre-existing diabetes or cardiovascular disease on April 1, 2013. Adherence during a 3-year screening period (2013-2016) and prediabetes and diabetes during a 4-year follow-up period were examined. Multivariate logistic regression was used to examine the adjusted association between sex and adherence. Among 1,380,697 individuals (49·2% male, 50·8% female) adherence rates were 69·9% in males and 79·8% in females. Sex-differences in adherence were largest in younger individuals (58·0% and 72·6% and in males and females aged 40-44 years, respectively) and consistent across rural/urban residence and material deprivation. Females were more adherent (adjusted odds ratio 1·92; 95% confidence interval 1·89 to 1·95) than males. Prediabetes and diabetes rates among individuals who adhered to screening guidelines were 15·7% and 2·6% among males and 13·4% and 1·5% among females. During the follow-up period, an additional 3·2% and 1·9% of adherent males and females had diabetes. Incidence rates of prediabetes and diabetes during the follow-up period among individuals who did not adhere to screening guidelines were 8·8% and 2·1% among males and 7·3% and 1·3% among females. Adherence to diabetes screening guidelines is sub-optimal, especially among young males. Despite lower rates of adherence to screening, males have higher rates of prediabetes and diabetes compared to females. There is a need for education campaigns to improve diabetes screening rates in young adults, especially males. This study was funded by the Canadian Institutes of Health Research Sex and Gender Science Chair (Recipient: Kaul).

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