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Is hyperfiltration associated with the future risk of developing diabetic nephropathy? A meta-analysis
G M Magee1, R W Bilous, C R Cardwell
1Regional Centre for Diabetes and Endocrinology, Level 1, Royal Victoria Hospital, Grosvenor Road, Belfast, BT12 6BA, UK. gmagee13@qub.ac.uk
Diabetologia
|February 10, 2009
Summary
Glomerular hyperfiltration in type 1 diabetes patients significantly increases the risk of developing diabetic nephropathy. This early sign of kidney changes warrants further investigation for better patient outcomes.
Area of Science:
- Nephrology
- Endocrinology
- Diabetology
Background:
- Glomerular hyperfiltration is an early phenomenon in some type 1 diabetes patients.
- The predictive value of hyperfiltration for diabetic nephropathy development remains unclear.
Purpose of the Study:
- To systematically review and meta-analyze observational studies on hyperfiltration and diabetic nephropathy risk.
- To explore the impact of baseline glomerular filtration rate (GFR) on nephropathy development.
Main Methods:
- Systematic review and meta-analysis of cohort studies in type 1 diabetic participants.
- Inclusion criteria: baseline GFR measurement, presence/absence of hyperfiltration, and development of incipient or overt nephropathy.
Main Results:
- Ten cohort studies with 780 patients were included; 130 developed nephropathy over a median of 11.2 years.
- Hyperfiltration was associated with a 2.71 times higher odds of progressing to microalbuminuria (95% CI 1.20-6.11).
- Higher baseline GFR was observed in patients who progressed to nephropathy (mean difference 13.8 ml/min/1.73 m², p < 0.01).
Conclusions:
- Published data indicate that glomerular hyperfiltration increases the risk of progression to diabetic nephropathy.
- Larger studies are needed to confirm this association and investigate confounding variables.
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