Healthier habits associated with lower T2D microvascular complication risk

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Among 15,104 UK Biobank T2D patients followed median 8.1 years, 4–5 low-risk lifestyle behaviors vs 0–1 linked to HR 0.54 for composite microvascular complications; biomarkers mediated ~23% of the association.

Source

Healthy lifestyle behaviors, mediating biomarkers, and risk of microvascular complications among individuals with type 2 diabetes: A cohort study

Geng T, Pan A, Liu G · PLoS medicine · 2023

doi.org/10.1371/journal.pmed.1004135 Read the full paper ↗158 citationscc by

Study at a glance

Design: Cohort — UK Biobank adults with T2D; lifestyle score 0–5 and microvascular outcomes
N: N=15104 · No baseline macro/microvascular complications; median follow-up 8.1 years
Population: UK Biobank adults with type 2 diabetes free of baseline vascular complications
Outcome: Composite and site-specific microvascular complications by lifestyle score

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What they did

Retrospective UK Biobank cohort of 15,104 adults with type 2 diabetes and no baseline macro/microvascular complications (2006–2010). Five lifestyle factors (waist circumference, smoking, physical activity, diet, alcohol) formed a 0–5 score. Outcomes ascertained from hospital/death records; Cox models adjusted for demographics, hypertension, HbA1c, and medications; mediation via blood biomarkers.

What they found

1,296 composite microvascular events over median 8.1 years. HRs for 4–5 vs 0–1 low-risk behaviors: 0.65 retinopathy, 0.43 kidney disease, 0.46 neuropathy, 0.54 composite (model 3). Each additional low-risk behavior lowered composite risk ~18%. PAF for <4 behaviors was 25.3% composite and 39.0% kidney disease. Albumin, HDL-C, triglycerides, apoA, CRP, and HbA1c jointly mediated 23.20% of composite association.

The limits

What it doesn't show

Observational—lifestyle measured once at baseline. Microvascular cases from hospital records may be undercounted. >85% White participants limits generalizability. Mediation assumes biomarkers lie on causal pathway.

Key terms

Microvascular complications: Diabetic retinopathy, kidney disease, and neuropathy outcomes in T2D.
Healthy lifestyle score: 0–5 points from WC, nonsmoking, top-third activity, healthy diet (≥5 components), moderate alcohol.
PAF: Population-attributable fraction—share potentially preventable if ≥4 low-risk behaviors.
Mediation analysis: Tests how much of lifestyle-outcome link passes through biomarkers like HbA1c and CRP.
Model 3: Fully adjusted Cox model including diabetes duration, HbA1c, and medication use.
UK Biobank T2D: Algorithm-identified type 2 diabetes among middle-aged/older UK volunteers.

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Sample size?

Common questions

How many patients and follow-up?

15,104 T2D patients; median follow-up 8.1 years (117,445 person-years).

Strongest lifestyle association?

Kidney disease HR 0.43 comparing 4–5 vs 0–1 low-risk behaviors.

Which biomarkers mediated most?

Albumin, HDL-C, triglycerides, apolipoprotein A, CRP, and HbA1c together explained 23.20% of composite association.

Did smoking alone predict outcomes?

Individual-factor models showed activity, lower WC, and moderate alcohol linked to lower risk; nonsmoking and healthy diet alone were not significant.