The effect of intensive treatment on long-term complications¶

One-paragraph summary¶

DCCT randomized 1,441 people with T1D to intensive or conventional insulin therapy. Intensive treatment reduced retinopathy development by 76%, retinopathy progression by 54%, microalbuminuria by 39%, and clinical neuropathy by 60%, while severe hypoglycemia increased approximately two- to threefold (PMID 8366922).

Key findings¶

Causal evidence that glycemic exposure modifies microvascular complications.
Benefit occurred in primary-prevention and secondary-intervention cohorts.
Treatment burden and hypoglycemia were inseparable from the original intensive regimen.

Limitations¶

Trial-era insulin, monitoring, and cardiovascular care differ from current practice.
Selected participants and protocol support limit direct population generalization.

Why it matters¶

This is the evidentiary foundation for intensive glycemic management; EDIC later demonstrated a legacy effect.

Cited by wiki pages¶

overview
complications
insulin therapy and technology
guidelines