Evaluation of the Effectiveness of Colonoscopy, Fecal Immunochemical Test and Risk-adapted Screening Strategies in Population-based Colorectal Cancer Screening: A Multicenter Randomized Controlled Trial
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摘要:
目的 评价结肠镜、免疫法粪便潜血检测(fecal immunochemical test,FIT)及风险分级筛查策略在人群结直肠癌筛查中的可行性和有效性。 方法 基于2018年5月—2021年5月全国6个中心开展的人群结直肠癌筛查随机对照试验(TARGET-C研究),将符合要求的受试者按照1∶2∶2的比例随机分配至结肠镜组、FIT组、分级筛查组(经风险评估,高风险人群接受结肠镜检查;低风险人群接受FIT检测,FIT阳性者接受结肠镜检查)。3组人群分别接受不同方案的结直肠癌筛查,其中结肠镜组仅接受基线筛查,FIT组与分级筛查组在基线筛查的基础上接受每年1次的随访筛查。主要研究结局为进展期肿瘤(包括结直肠癌和进展期腺瘤)检出率。比较3种筛查方案的人群参与率、进展期肿瘤检出率和结肠镜检查负荷。 结果 共入选符合纳入与排除标准的受试者19 373名,包括男性8082名(41.7%),女性11 291名(58.3%);平均年龄(60.5±6.5)岁。其中结肠镜组3883名、FIT组7793名、分级筛查组7697名。FIT组与分级筛查组已完成2轮次随访筛查。FIT组整体人群筛查参与率最高(99.3%),分级筛查组次之(89.2%),结肠镜组最低(42.3%)。意向性分析结果显示,结肠镜组进展期肿瘤检出率高于FIT组(2.76%比2.17%,OR结肠镜组比FIT组=1.30,95% CI:1.01~1.65,P=0.037),结肠镜组与分级筛查组进展期肿瘤检出率无统计学差异(2.76%比2.35%,OR结肠镜组比分级筛查组=1.19, 95% CI:0.93~1.51,P=0.156),分级筛查组与FIT组进展期肿瘤检出率亦无统计学差异(2.35%比2.17%,OR分级筛查组比FIT组=1.09,95% CI:0.88~1.34,P=0.440)。以每检出1例进展期肿瘤所需要的结肠镜检查次数作为评价人群筛查时结肠镜检查负荷的指标,结肠镜组的结肠镜检查负荷最高(15.4次),分级筛查组次之(10.2次),FIT组最低(7.8次)。 结论 基于结直肠癌风险评估的分级筛查策略对于人群结直肠癌的筛查具有可行性和有效性,可作为传统结肠镜检查和FIT筛查方案的有效补充。 Abstract:Objective To evaluate the feasibility and effectiveness of colonoscopy, fecal immunochemical test(FIT) and risk-adapted screening strategies in population-based colorectal cancer screening. Methods Based on the randomized controlled trial of colorectal cancer screening(TARGET-C) which was carried out in 6 centers of 5 provinces in China from May 2018 to May 2021, the participants who met the inclusion criteria of the study were randomly assigned to one of the following screening intervention groups in a ratio of 1∶2∶2, which were colonoscopy group, FIT group and risk-adapted screening group(participants evaluated to be at high risk were recommended to undertake colonoscopy, those at low risk were recommended to undertake FIT and FIT positive people received colonoscopy). The 3 groups received different schemes of colorectal cancer screening, in which the colonoscopy group only received baseline screening, whereas the FIT group and the risk-adapted screening group received annual follow-up screening on the basis of baseline screening. The main outcome was the detection rate for advanced colorectal neoplasm(including colorectal cancer and advanced adenoma). The participation rate, detection rate for any neoplasm and resource load of colonoscopy among different screening groups were further analyzed. Results A total of 19 373 participants meeting the inclusion and exclusion criteria were enrolled, including 8082 males(41.7%) and 11 291 females(58.3%), with an average age of (60.5±6.5) years. Among them, 3883 were in the colonoscopy group, 7793 in the FIT group, and 7697 in the risk-adapted screening group. After 1 or 3 rounds of screening(2 rounds of follow-up screening completed in FIT group and risk-adapted screening group), the overall participation was the highest for the FIT group(99.3%), followed by the risk-adapted screening group(89.2%) and the coloscopy group(42.3%). According to the intention-to-treat analysis, the detection rates of advanced neoplasm in the colonoscopy group was higher than that in the FIT group(2.76% vs. 2.17%, ORcolonoscopy vs FIT=1.30, 95% CI: 1.01-1.65, P=0.037); there were no statistically significant differences regarding the detection rates of advanced neoplasm between the colonoscopy group and the risk-adapted screening group(2.76% vs. 2.35%, ORcolonoscopy vs risk-adapted screening=1.19, 95% CI: 0.93-1.51, P=0.156), and between the risk-adapted screening group and the FIT group(2.35% vs. 2.17%, ORrisk-adapted screening vs FIT=1.09, 95% CI: 0.88-1.34, P=0.440). The number of colonoscopies needed to be performed to detect one advanced neoplasm was used as an indicator to evaluate the resource load of colonoscopy. The number was the highest for the coloscopy group(15.4), followed by the risk-adapted screening group(10.2) and the FIT group(7.8). Conclusions The risk-adapted screening strategy is feasible and effective in population-based colorectal cancer screening, and could serve as an effective supplement to the traditional colonoscopy and FIT-based colorectal cancer screening strategies. -
Key words:
- colorectal neoplasm /
- fecal immunochemical test /
- colonoscopy /
- risk-adapted screening /
- risk assessment
作者贡献:陈宏达负责研究方案设计、实施和论文撰写;廖先珍、杜灵彬、董栋、魏东华、高屹、郑卫方、陈静君、石菊芳负责各中心研究实施、数据收集;卢明、张愉涵、陆斌、骆晨雨、李娜、周月阳、骆家辉、蔡洁负责数据整理与核查;代敏负责总体研究设计、论文修订;所有作者均参与论文审校。利益冲突:所有作者均声明不存在利益冲突 -
图 2 3组筛查方案的人群参与率
FIT:同图 1
表 1 19 373名受试者基线资料比较[n(%)]
指标 结肠镜组(n=3883) FIT组(n=7793) 分级筛查组(n=7697) P值 性别0.172 0.172 男性 1617(41.6) 3310(42.5) 3155(41.0) 女性 2266(58.4) 4483(57.5) 4542(59.0) 年龄(岁) 0.545 50~54 906(23.3) 1825(23.4) 1836(23.9) 55~59 830(21.4) 1603(20.6) 1574(20.4) 60~64 992(25.5) 1924(24.7) 1886(24.5) 65~69 807(20.8) 1729(22.2) 1658(21.5) 70~74 348(9.0) 712(9.1) 743(9.7) 教育背景* 0.614 初中及以下 2701(73.4) 5605(72.2) 5595(72.9) 高中 696(18.9) 1542(19.9) 1495(19.5) 大学及以上 281(7.6) 621(8.0) 582(7.6) 体质量指数(kg/m2)* 0.614 <23 1395(37.9) 2872(37.0) 2860(37.3) ≥23 2283(62.1) 4896(63.0) 4812(62.7) 吸烟* 0.646 非吸烟 2978(81.0) 6269(80.7) 6154(80.2) 戒烟 572(15.6) 1217(15.7) 1212(15.8) 吸烟 128(3.5) 282(3.6) 306(4.0) 饮酒* 0.168 从不 2659(72.3) 5722(73.7) 5649(73.6) 偶尔 491(13.3) 1047(13.5) 983(12.8) 规律 528(14.4) 999(12.9) 1040(13.6) 一级亲属结直肠癌家族史* <0.001 是 160(4.4) 335(4.3) 473(6.2) 否 3427(93.2) 7277(93.7) 7038(91.7) 不清楚 91(2.5) 156(2.0) 161(2.1) FIT:同图 1;*结肠镜组、FIT组和分级筛查组中分别有205名、25名、25名受试者信息缺失 表 2 3次筛查中FIT组与分级筛查组FIT阳性率以及结肠镜检查顺应率比较
筛查方案 基线筛查 第1次随访筛查 第2次随访筛查 FIT阳性率
[%,(N阳性/N受检)]结肠镜检查顺应率
[%,(N接受/N阳性)]FIT阳性率
[%,(N阳性/N受检)]结肠镜检查顺应率
[%,(N接受/N阳性)]FIT阳性率
[%,(N阳性/N受检)]结肠镜检查顺应率
[%,(N接受/N阳性)]FIT组 13.7(1071/7793) 76.3(817/1071) 5.6(341/6048) 75.7(258/341) 5.5(339/6113) 71.7(243/339) 分级筛查组(低风险人群) 10.2(782/7697) 76.9(601/782) 3.8(244/6352) 74.6(182/244) 2.7(163/6131) 60.1(98/163) FIT: 同图 1 表 3 结肠镜组、FIT组和分级筛查组3次筛查中进展期肿瘤检出率比较
筛查阶段 进展期肿瘤(%,95% CI) 结肠镜组比FIT组 结肠镜组 FIT组 分级筛查组 OR(95% CI)† P值 基线筛查 总体 2.76(2.29~3.32) 1.15(0.94~1.42) 1.65(1.39~1.96) 2.45(1.84~3.26) <0.001 近端结肠* 1.36(1.05~1.78) 0.53(0.39~0.71) 0.62(0.47~0.83) 2.62(1.74~3.97) <0.001 远端结肠和直肠# 1.73(1.36~2.19) 0.80(0.62~1.02) 1.17(0.95~1.43) 2.19(1.54~3.12) <0.001 基线筛查+第1次随访筛查 总体 2.76(2.29~3.32) 1.67(1.41~1.98) 1.91(1.63~2.24) 1.68(1.29~2.18) <0.001 近端结肠* 1.36(1.05~1.78) 0.72(0.55~0.93) 0.73(0.56~0.94) 1.91(1.30~2.79) 0.001 远端结肠和直肠# 1.73(1.36~2.19) 1.15(0.94~1.42) 1.35(1.12~1.63) 1.50(1.08~2.06) 0.014 基线筛查+第1次随访筛查+第2次随访筛查 总体 2.76(2.29~3.32) 2.17(1.87~2.52) 2.35(2.04~2.71) 1.30(1.01~1.65) 0.037 近端结肠* 1.36(1.05~1.78) 0.96(0.77~1.20) 0.90(0.71~1.13) 1.46(1.03~2.05) 0.031 远端结肠和直肠# 1.73(1.36~2.19) 1.48(1.23~1.77) 1.65(1.39~1.96) 1.19(0.88~1.61) 0.244 筛查阶段 结肠镜组比分级筛查组 分级筛查组比FIT组 OR(95% CI)† P值 OR(95% CI)† P值 基线筛查 总体 1.69(1.29~2.20) <0.001 1.45(1.11~1.92) 0.008 近端结肠* 2.21(1.49~3.28) <0.001 1.19(0.79~1.82) 0.409 远端结肠和直肠# 1.46(1.06~2.02) 0.021 1.49(1.08~2.08) 0.017 基线筛查+第1次随访筛查 总体 1.45(1.12~1.87) 0.004 1.15(0.91~1.47) 0.245 近端结肠* 1.89(1.29~2.76) 0.001 1.01(0.70~1.47) 0.941 远端结肠和直肠# 1.26(0.92~1.72) 0.148 1.18(0.88~1.57) 0.266 基线筛查+第1次随访筛查+第2次随访筛查 总体 1.19(0.93~1.51) 0.156 1.09(0.88~1.34) 0.440 近端结肠* 1.56(1.10~2.20) 0.012 0.94(0.68~1.29) 0.681 远端结肠和直肠# 1.06(0.79~1.42) 0.680 1.12(0.87~1.44) 0.384 FIT:同图 1;*包括病变检出部位仅为近端结肠或近端与远端结肠/直肠同时存在的病例;#包括病变检出部位仅为远端结肠/直肠或近端与远端结肠/直肠同时存在的病例;†Logistics回归分析校正年龄、性别和研究中心后,各筛查方案对进展期肿瘤检出风险的OR值和95% CI 表 4 结肠镜组、FIT组和分级筛查组3次筛查中结肠镜检查负荷比较
筛查阶段 进展期肿瘤(n, 95% CI) 任意结直肠肿瘤(n, 95% CI) 结肠镜组 FIT组 分级筛查组 结肠镜组 FIT组 分级筛查组 基线筛查 总体 15.4(12.8~18.5) 9.1(7.5~11.1) 10.3(8.8~12.2) 4.1(3.8~4.5) 3.2(2.9~3.5) 3.5(3.2~3.8) 男性 10.7(8.5~13.5) 6.5(5.2~8.3) 8.0(6.7~9.5) 3.0(2.7~3.4) 2.5(2.2~2.8) 2.8(2.6~3.1) 女性 22.9(17.0~30.9) 14.7(10.4~21.1) 22.4(14.9~34.0) 5.6(4.9~6.4) 4.5(3.8~5.4) 5.9(4.9~7.3) 基线筛查+第1次随访筛查 总体 15.4(12.8~18.5) 8.3(7.1~9.7) 10.5(9.0~12.2) 4.1(3.8~4.5) 3.1(2.9~3.4) 3.4(3.2~3.7) 男性 10.7(8.5~13.5) 6.2(5.1~7.5) 8.2(6.9~9.8) 3.0(2.7~3.4) 2.5(2.3~2.8) 2.9(2.6~3.1) 女性 22.9(17.0~30.9) 12.5(9.4~16.7) 18.6(13.4~26.1) 5.6(4.9~6.4) 4.2(3.6~4.9) 5.1(4.3~6.0) 基线筛查+第1次随访筛查+第2次随访筛查 总体 15.4(12.8~18.5) 7.8(6.8~9.0) 10.2(8.9~11.8) 4.1(3.8~4.5) 3.0(2.8~3.3) 3.5(3.2~3.7) 男性 10.7(8.5~13.5) 5.9(5.0~7.0) 8.3(7.1~9.8) 3.0(2.7~3.4) 2.5(2.3~2.7) 2.9(2.7~3.1) 女性 22.9(17.0~30.9) 11.4(8.9~14.5) 15.3(11.8~20.1) 5.6(4.9~6.4) 3.9(3.5~4.5) 4.9(4.3~5.6) FIT: 同图 1 -
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