Ivar A Eide1, Trond Jenssen2, Anders Hartmann3, Lien M Diep4, Dag O Dahle5, Anna V Reisæter6, Kristian S Bjerve7, Jeppe H Christensen8, Erik B Schmidt9, My Svensson10. 1. Department of Transplant Medicine, Section of Nephrology, Oslo University Hospital, Oslo, Norway; ivaeid@ous-hf.no. 2. Department of Transplant Medicine, Section of Nephrology, Oslo University Hospital, Oslo, Norway; Metabolic and Renal Research Group, University of Tromsø The Arctic University of Norway, Tromsø, Norway; 3. Department of Transplant Medicine, Section of Nephrology, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, The University of Oslo, Oslo, Norway; 4. Department of Biostatistics, Epidemiology and Health Care Economics, Oslo University Hospital, Oslo, Norway; 5. Department of Transplant Medicine, Section of Nephrology, Oslo University Hospital, Oslo, Norway; 6. Department of Transplant Medicine, Section of Nephrology, Oslo University Hospital, Oslo, Norway; The Norwegian Renal Registry, Oslo University Hospital, Rikshospitalet, Oslo, Norway; 7. Department of Medical Biochemistry, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway; Department of Laboratory Medicine, Children's and Women's Health, Norwegian University of Science and Technology, Trondheim, Norway; and. 8. Departments of Nephrology and. 9. Cardiology, Aalborg University Hospital, Aalborg, Denmark; and. 10. Department of Nephrology, Aarhus University Hospital, Aarhus, Denmark.
Abstract
BACKGROUND AND OBJECTIVES: Several studies have reported beneficial cardiovascular effects of marine n-3 polyunsaturated fatty acids. To date, no large studies have investigated the potential benefits of marine n-3 polyunsaturated fatty acids in recipients of renal transplants. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: In this observational cohort study of 1990 Norwegian recipients of renal transplants transplanted between 1999 and 2011, associations between marine n-3 polyunsaturated fatty acid levels and mortality were investigated by stratified analysis and multivariable Cox proportional hazard regression analysis adjusting for traditional and transplant-specific mortality risk factors. Marine n-3 polyunsaturated fatty acid levels in plasma phospholipids were measured by gas chromatography in a stable phase 10 weeks after transplantation. RESULTS: There were 406 deaths (20.4%) during a median follow-up period of 6.8 years. Mortality rates were lower in patients with high marine n-3 polyunsaturated fatty acid levels (≥7.95 weight percentage) compared with low levels (<7.95 weight percentage) for all age categories (pooled mortality rate ratio estimate, 0.69; 95% confidence interval, 0.57 to 0.85). When divided into quartiles according to marine n-3 polyunsaturated fatty acid levels, patients in the upper quartile compared with the lower quartile had a 56% lower risk of death (adjusted hazard ratio, 0.44; 95% confidence interval, 0.26 to 0.75) using multivariable Cox proportional hazard regression analysis. There was a lower hazard ratio for death from cardiovascular disease with high levels of marine n-3 polyunsaturated fatty acid and a lower hazard ratio for death from infectious disease with high levels of the marine n-3 polyunsaturated fatty acid eicosapentaenoic acid, whereas there was no association between total or individual marine n-3 polyunsaturated fatty acid levels and cancer mortality. CONCLUSIONS: Higher plasma phospholipid marine n-3 polyunsaturated fatty acid levels were independently associated with better patient survival.
BACKGROUND AND OBJECTIVES: Several studies have reported beneficial cardiovascular effects of marine n-3 polyunsaturated fatty acids. To date, no large studies have investigated the potential benefits of marine n-3 polyunsaturated fatty acids in recipients of renal transplants. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: In this observational cohort study of 1990 Norwegian recipients of renal transplants transplanted between 1999 and 2011, associations between marine n-3 polyunsaturated fatty acid levels and mortality were investigated by stratified analysis and multivariable Cox proportional hazard regression analysis adjusting for traditional and transplant-specific mortality risk factors. Marine n-3 polyunsaturated fatty acid levels in plasma phospholipids were measured by gas chromatography in a stable phase 10 weeks after transplantation. RESULTS: There were 406 deaths (20.4%) during a median follow-up period of 6.8 years. Mortality rates were lower in patients with high marine n-3 polyunsaturated fatty acid levels (≥7.95 weight percentage) compared with low levels (<7.95 weight percentage) for all age categories (pooled mortality rate ratio estimate, 0.69; 95% confidence interval, 0.57 to 0.85). When divided into quartiles according to marine n-3 polyunsaturated fatty acid levels, patients in the upper quartile compared with the lower quartile had a 56% lower risk of death (adjusted hazard ratio, 0.44; 95% confidence interval, 0.26 to 0.75) using multivariable Cox proportional hazard regression analysis. There was a lower hazard ratio for death from cardiovascular disease with high levels of marine n-3 polyunsaturated fatty acid and a lower hazard ratio for death from infectious disease with high levels of the marine n-3 polyunsaturated fatty acideicosapentaenoic acid, whereas there was no association between total or individual marine n-3 polyunsaturated fatty acid levels and cancer mortality. CONCLUSIONS: Higher plasma phospholipid marine n-3 polyunsaturated fatty acid levels were independently associated with better patient survival.
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