Educational disparities in the associations between self-monitoring of blood glucose and glycemic control in type 2 diabetes patients in Xiamen, China

BackgroundThis study examined the combined effects of self-monitoring of blood glucose (SMBG) and educational attainment on glycemic control in type 2 diabetes mellitus (T2DM) patients. MethodsA cross-sectional survey was performed among community residents with T2DM. Good glycemic control was defined as HbA1c <7% in the most recent measurement. Multivariable logistic regression was used to examine associations of glycemic control with SMBG, educational attainment, and their combined effects by controlling for certain covariates, with further stratification by sex. ResultsComplete data were available for 798 patients, of which 58.52% had good glycemic control. Higher education and SMBG were associated with good glycemic control (P<0.05). In the SMBG group, tertiary-educated patients had the greatest odds of good glycemic control (odds ratios 2.56; 95% confidence interval 1.31-4.99). Among those performing SMBG, the odds of good glycemic control were higher for those with higher education levels (P-trend=0.003), whereas there was no clear trend for those not performing SMBG (P-trend=0.071). For subjects attaining secondary and tertiary education levels, the odds of good glycemic control were higher in those performing SMBG, although there was no significant difference between the two groups for those with a primary education. Glycemic control decreased slightly among males with a primary level education, but showed an increasing trend among females with a primary level education. ConclusionsSex-specific educational disparities exist in the association between SMBG and glycemic control. More detailed guidelines for SMBG according to a subject's socioeconomic position and sex are required.