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Continental variations in IgA nephropathy among Asians
S Prakash1, T Kanjanabuch, P C Austin
1University of California-San Francisco, CA, USA. suma74@gmail.com
Clinical Nephrology
|November 13, 2008
Summary
IgA nephropathy patients in Thailand showed slower kidney function decline compared to Canadian patients, despite similar disease severity. Thai patients received more ACE-I/ARB or prednisone therapy at baseline.
Area of Science:
- Nephrology
- Immunology
- Epidemiology
Background:
- IgA nephropathy (IgAN) outcomes can vary due to local patient demographics and medical practices.
- International comparisons are crucial for understanding IgAN variability in Asian populations.
Purpose of the Study:
- To compare baseline characteristics and renal outcomes of Asian patients with IgA nephropathy in Thailand and Canada.
- To investigate potential factors influencing differences in IgAN progression across continents.
Main Methods:
- Retrospective analysis of two IgAN cohorts: Thai (King Chulalongkorn Memorial Hospital, 1994-2005) and Canadian (Toronto Glomerulonephritis Registry, 1975-2006).
- Comparison of baseline demographics, clinical presentation, and treatment.
- Estimation of annual estimated glomerular filtration rate (eGFR) slope using repeated measures regression, adjusted for multiple covariates.
Main Results:
- 76 Thai and 152 Canadian patients were analyzed.
- Thai patients were more often female, had less baseline proteinuria, and received more ACE-I/ARB or prednisone therapy.
- Adjusted annual eGFR decline was -0.82 ml/min/1.73 m²/year in Thailand versus -3.35 ml/min/1.73 m²/year in Canada.
Conclusions:
- Despite similar IgAN severity, Thai patients experienced a slower rate of kidney function decline compared to Canadian patients.
- Baseline treatment differences, including higher use of ACE-I/ARB or prednisone in Thailand, may contribute to observed outcome variations.
- Further research is needed to explore international differences in demographic, environmental, and healthcare factors impacting IgAN outcomes in Asians.
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