Abstract
The objective of this review was to synthesize the available randomized controlled trials (RCTs) estimating the relative efficacy and safety of intensive vs less intensive glycemic control in preventing diabetic foot syndrome. We used the umbrella design (systematic review of systematic reviews) to identify eligible RCTs. Two reviewers determined RCT eligibility and extracted descriptive, methodologic, and diabetic foot outcome data. Random-effects meta-analysis was used to pool outcome data across studies, and the I(2) statistic was used to quantify heterogeneity. Nine RCTs enrolling 10,897 patients with type 2 diabetes were included and deemed to be at moderate risk of bias. Compared with less intensive glycemic control, intensive control (hemoglobin A1c, 6%-7.5%) was associated with a significant decrease in risk of amputation (relative risk [RR], 0.65; 95% confidence interval [CI], 0.45-0.94; I(2) = 0%). Intensive control was significantly associated with slower decline in sensory vibration threshold (mean difference, -8.27; 95% CI, -9.75 to -6.79). There was no effect on other neuropathic changes (RR, 0.89; 95% CI, 0.75-1.05; I(2) = 32%) or ischemic changes (RR, 0.92; 95% CI, 0.67-1.26; I(2) = 0%). The quality of evidence ...Continue Reading
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