Differences in mortality的用法和样例：
例句
- Differences among those with total pancreatectomy were not significant because of the small sample size.
由于样本量过小，全胰腺切除术死亡率差异不具有统计学意义。 - The difference in age and morbidity does not account for the disparity in mortality between cognitive impaired and non-impaired subjects.
控制了慢性病患病率和年龄的差别后，认知功能水平的死亡率差异仍有显著意义。
