Early @entity204 following primary XXXX .

@entity1 @entity204 @entity348
BACKGROUND: Total knee arthroplasty carries major risks, including @entity204 . Conventional studies have compared the mortality rate following @entity348 with standardized mortality ratios or age and sex-matched populations. The purpose of the present study was to compare the mortality rate in a population of @entity1 who were managed with @entity348 with that in @entity1 who were awaiting surgery. METHODS: All @entity1 undergoing primary @entity348 from 2000 to 2007 at a single institution were recorded. In the same period, all @entity1 who were added to the waiting list for @entity348 were recorded. The mortality rate and time to @entity204 were calculated, and @entity204 certificates were retrieved for those who died within thirty or ninety days after the index event. RESULTS: Two thousand, six hundred and ninety-five @entity1 undergoing primary @entity348 were used for the thirty-day mortality calculation, and 2527 were used for the ninety-day mortality calculation. These @entity1 were compared with 5857 and 5689 @entity1 who were added to the waiting list for the thirty-day and ninety-day mortality calculations, respectively. There was no difference between the populations in terms of age or sex (p > 0.05). The thirty-day mortality following surgery was significantly greater for the surgery group (0.371%; 95% confidence interval, 0.202% to 0.682%) than for the waiting list group (0.0683%; 95% confidence interval, 0.0266% to 0.1755%) (odds ratio, 5.45; 95% confidence interval, 1.81 to 16.43). The ninety-day mortality was also significantly greater for the surgery group (0.792%; 95% confidence interval, 0.513% to 1.219%) than for the waiting list group (0.387%; 95% confidence interval, 0.256% to 0.585%) (odds ratio, 2.05; 95% confidence interval, 1.13 to 3.74). CONCLUSIONS: Primary @entity348 is associated with an increased risk of @entity204 at thirty and ninety days after the operation when compared with a population awaiting the same procedure. Increasing age was a risk factor for @entity204 following @entity348 .
