Effectiveness of non-pharmacological interventions on metabolic control in adults with type 2 diabetes: a systematic review and meta-analysis of randomised controlled trials.
Tran Thi My, Nantiya Watthayu
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In 30 seconds
This systematic review and meta-analysis pooled randomised controlled trials of non-pharmacological interventions versus usual care, standard care, or no intervention in adults with type 2 diabetes. Across 42 trials involving 9,586 participants, interventions improved several metabolic-control measures. The largest reported glycaemic result was a reduction in HbA1c (mean difference -0.43 percentage points, 95% CI -0.55 to -0.32). Fasting glucose, waist circumference, and blood pressure also decreased, while triglycerides and high-density lipoprotein cholesterol did not improve significantly. The authors describe the benefits as modest and advise caution given heterogeneity and possible small-study effects.
Key findings
- HbA1c decreased by a mean difference of -0.43 percentage points (95% CI -0.55 to -0.32).
- Fasting glucose decreased by MD -0.57 mmol/L (95% CI -0.83 to -0.32).
- Waist circumference decreased by MD -2.25 cm (95% CI -3.32 to -1.19).
- Systolic and diastolic blood pressure decreased; triglycerides and high-density lipoprotein cholesterol did not significantly improve.
Why it matters
The findings suggest that non-pharmacological approaches can contribute to glycaemic and selected cardiometabolic improvements in adults with type 2 diabetes. The effects were modest and did not extend to all measured lipid outcomes, so the results support a measured view of their potential contribution rather than implying broad metabolic control from these interventions alone.
What to keep in mind
The authors note heterogeneity and possible small-study effects. The review also found no significant duration effect in meta-regression.