Transplantation · 2002
Risk factors for fractures in kidney transplantation.
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O'Shaughnessy Eileen A, Dahl David C, Smith Charles L, Kasiske Bertram L
Аннотация
BACKGROUND: Risk factors for fracture after kidney transplantation need to be identified to target patients most likely to benefit from preventive measures.
METHODS: Medical records were reviewed for 1572 kidney transplants done at a single center between February, l963 and May, 2000 with 6.5+/-5.4 years of follow-up.
RESULTS: One or more fractures occurred in 300 (19.1%), with multiple fractures in 101 (6.4%). After excluding fractures of the foot or ankle (n=130 transplants, 8.3%), avascular necrosis (n=86, 5.5%), and vertebral fractures (n=28, 1.8%), there were one or more fractures in 196 (12.5%), with a cumulative incidence of 12.0%, 18.5%, and 23.0% at 5, 10, and 15 years, respectively. In multivariate Cox proportional hazards analysis, age had no effect on fractures in men. Compared with men and younger women, women 46-60 and >60 years old were, respectively, 2.11 (95% confidence interval 1.43-3.12, P=0.0002) and 3.47 (2.16-5.60, P<0.0001) times more likely to have fractures. Kidney failure from type 1 and 2 diabetes increased the risk by 2.08 (1.47-2.95, P<0.0001) and 1.92 (1.15-3.20, P=0.0131), respectively. A history of fracture pretransplant increased the risk by 2.15 (1.49-3.09, P<0.0001). Each year of pretransplant kidney failure increased the risk by 1.09 (1.05-1.14, P<0.0001). Obesity (body mass index >30 kg/m2) was associated with 55% (17-76%, P=0.0110) less risk. Different immunosuppressive medications, acute rejections, and multiple other factors were not independently associated with fractures.
CONCLUSIONS: The population of transplant patients at high risk for fracture can be identified using age/gender, pretransplant fracture history, diabetes, obesity, and years of pretransplant kidney failure.
METHODS: Medical records were reviewed for 1572 kidney transplants done at a single center between February, l963 and May, 2000 with 6.5+/-5.4 years of follow-up.
RESULTS: One or more fractures occurred in 300 (19.1%), with multiple fractures in 101 (6.4%). After excluding fractures of the foot or ankle (n=130 transplants, 8.3%), avascular necrosis (n=86, 5.5%), and vertebral fractures (n=28, 1.8%), there were one or more fractures in 196 (12.5%), with a cumulative incidence of 12.0%, 18.5%, and 23.0% at 5, 10, and 15 years, respectively. In multivariate Cox proportional hazards analysis, age had no effect on fractures in men. Compared with men and younger women, women 46-60 and >60 years old were, respectively, 2.11 (95% confidence interval 1.43-3.12, P=0.0002) and 3.47 (2.16-5.60, P<0.0001) times more likely to have fractures. Kidney failure from type 1 and 2 diabetes increased the risk by 2.08 (1.47-2.95, P<0.0001) and 1.92 (1.15-3.20, P=0.0131), respectively. A history of fracture pretransplant increased the risk by 2.15 (1.49-3.09, P<0.0001). Each year of pretransplant kidney failure increased the risk by 1.09 (1.05-1.14, P<0.0001). Obesity (body mass index >30 kg/m2) was associated with 55% (17-76%, P=0.0110) less risk. Different immunosuppressive medications, acute rejections, and multiple other factors were not independently associated with fractures.
CONCLUSIONS: The population of transplant patients at high risk for fracture can be identified using age/gender, pretransplant fracture history, diabetes, obesity, and years of pretransplant kidney failure.