Methods: 500 cases of elder as studied group and 100 cases of not elder as control group were studied by stomach double contrast barium meal examination.
方法：以500例老年人为研究组，100例非老年人为对照组，通过双对比造影检查结果进行对照分析。
Methods: 500 cases of elder as studied group and 100 cases of not elder as control group were studied by stomach double contrast barium meal examination.
方法：以500例老年人为研究组，100例非老年人为对照组，通过双对比造影检查结果进行对照分析。
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