Lastly, we sought to report differences in mortality among different age groups undergoing THA.

最后，我们报告不同年龄群体行全髋置换术死亡率的不同。

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One reason for BMI's tenacity can be seen in the availability of so many patients for the JAMA study, enough to provide the statistical power to detect 6% differences in mortality among groups.

WSJ: A Good Way to Measure Obesity? Fat Chance