翻译：Participants who were involved in colonoscopy screening tests including sigmoidoscopy constituted the intervention group including combined screening with fecal occult blood test and the control gr
参与结肠镜筛查测试（包括乙状结肠镜）的参与者构成干预组（包括联合筛查与隐血便检测），对照组未接受结肠镜筛查（但包括接受常规护理）。
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