XXXX and @entity731 in dialysis @entity1 .

@entity1 @entity1187 @entity4886 @entity5507 @entity3147 @entity1011 @entity731 @entity204
Longitudinal associations of @entity3147 with @entity731 events in @entity5507 are unclear. In 50,732 incident Medicare dialysis @entity1 who had normal (18.5 to 24.9 kg/m(2)), low (<18.5 kg/m(2)), or high (> or = 25 kg/m(2)) body mass index (BMI) and initiated dialysis in the United States from January 1995 to December 1999 with reported measured @entity1011 clearances and @entity1187 ( @entity4886 ; International Classification of Diseases, Ninth Revision codes 410.x and 411.x) were examined in parametric survival models. Normal BMI was the referent group. Twenty-four-hour urinary @entity1011 (UCr) was used as a measure of muscle mass. There were 7213 (14.2%) hospitalized @entity4886 events, 1528 (22%) of which were fatal ( @entity204 within 30 d). One-year post- @entity4886 mortality was 48%. Low BMI (hazard ratio [HR], 0.89; P = 0.02] was associated with lower hazard, and UCr was not predictive (NS) of hospitalized @entity4886 in multivariable model. Low BMI (NS) was not associated with a composite end point of hospitalized @entity4886 /suspected out-of-hospital @entity4886 @entity204 , whereas lowest UCr quartile was associated with higher hazard (HR, 1.14; P < 0.001). Low BMI (HR, 1.24; P < 0.001) and decrease in UCr (highest quartile reference, second quartile HR, 1.11 [P < 0.001]; third quartile HR, 1.24 [P < 0.001]; and fourth quartile HR, 1.43 [P < 0.001]) were associated with increased hazard of @entity204 . Hospitalized @entity4886 events in dialysis @entity1 carry very high immediate and long-term mortality. Positive longitudinal associations of @entity3147 with documented hospitalized @entity4886 events could not be demonstrated. Further longitudinal studies are warranted to provide definitive evidence of @entity3147 as a uremic risk factor for @entity731 .
