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Transition to quantitative faecal immunochemical testing from guaiac faecal occult blood testing in a fully rolled-out population-based national bowel screening programme
Gut ( IF 23.0 ) Pub Date : 2020-03-31 , DOI: 10.1136/gutjnl-2019-320297
Gavin Clark 1 , Judith A Strachan 2 , Frank A Carey 3 , Thomas Godfrey 1 , Audrey Irvine 4 , Alisson McPherson 2 , Jess Brand 5 , Annie S Anderson 6 , Callum G Fraser 7 , Robert Jc Steele 8
Affiliation  

Objective Faecal immunochemical tests (FIT) are replacing guaiac faecal occult blood tests (FOBT) in colorectal cancer (CRC) screening. Data from the first year of FIT screening were compared with those from FOBT screening and assumptions based on a pilot evaluation of FIT. Design Data on uptake, positivity, positive predictive value (PPV) for CRC and higher-risk adenoma from participants in the first year of the FIT-based Scottish Bowel Screening Programme (n=919 665), with a threshold of 80 µg Hb/g faeces, were compared with those from the penultimate year of the FOBT-based programme (n=862 165) and those from the FIT evaluation (n=66 225). Results Overall, uptake of FIT was 63.9% compared with 56.4% for FOBT. Positivity was 3.1% and 2.2% with FIT and FOBT; increases were seen in both sexes, and across age range and deprivation. More CRC and adenomas were detected by FIT, but the PPV for CRC was less (5.2% with FIT and 6.4% with FOBT). However, for higher-risk adenoma, PPV was greater with FIT (24.3% with FIT and 19.3% with FOBT). In the previous FIT evaluation, uptake was 58.5% with FIT compared with 54.0% with FOBT; positivity was 2.5% with FIT and 2.0% with FOBT. Conclusion Transition to FIT from FOBT produced higher uptake and positivity with lower PPV for CRC and higher PPV for adenoma. The FIT pilot evaluation underestimated uptake and positivity. Introducing FIT at the same threshold as the evaluation caused a 67.2% increase in colonoscopy demand instead of a predicted 10%.

中文翻译:

在全面推出的基于人群的国家肠道筛查计划中,从愈创木脂粪便潜血检测过渡到定量粪便免疫化学检测

目的 粪便免疫化学试验 (FIT) 正在取代愈创木脂粪便潜血试验 (FOBT) 在结直肠癌 (CRC) 筛查中进行。将 FIT 筛查第一年的数据与基于 FIT 试点评估的 FOBT 筛查和假设进行比较。基于 FIT 的苏格兰肠道筛查计划 (n=919 665) 的第一年参与者对 CRC 和高危腺瘤的摄取、阳性、阳性预测值 (PPV) 的设计数据,阈值为 80 µg Hb/ g 粪便与基于 FOBT 计划的倒数第二年的粪便 (n=862 165) 和 FIT 评估的粪便 (n=66 225) 进行比较。结果 总体而言,FIT 的吸收率为 63.9%,而 FOBT 的吸收率为 56.4%。FIT 和 FOBT 的阳性率分别为 3.1% 和 2.2%;男女、年龄范围和贫困状况都有所增加。FIT 检测到更多的 CRC 和腺瘤,但 CRC 的 PPV 较少(FIT 为 5.2%,FOBT 为 6.4%)。然而,对于风险较高的腺瘤,FIT 的 PPV 更高(FIT 为 24.3%,FOBT 为 19.3%)。在之前的 FIT 评估中,FIT 的吸收率为 58.5%,而 FOBT 的吸收率为 54.0%;FIT 的阳性率为 2.5%,FOBT 的阳性率为 2.0%。结论 从 FOBT 过渡到 FIT 产生了更高的摄取和阳性,CRC 的 PPV 较低,腺瘤的 PPV 较高。FIT 试点评估低估了接受度和积极性。在与评估相同的阈值下引入 FIT 导致结肠镜检查需求增加 67.2%,而不是预测的 10%。在之前的 FIT 评估中,FIT 的摄取率为 58.5%,而 FOBT 的摄取率为 54.0%;FIT 的阳性率为 2.5%,FOBT 的阳性率为 2.0%。结论 从 FOBT 过渡到 FIT 产生了更高的摄取和阳性,CRC 的 PPV 较低,腺瘤的 PPV 较高。FIT 试点评估低估了接受度和积极性。在与评估相同的阈值下引入 FIT 导致结肠镜检查需求增加 67.2%,而不是预测的 10%。在之前的 FIT 评估中,FIT 的摄取率为 58.5%,而 FOBT 的摄取率为 54.0%;FIT 的阳性率为 2.5%,FOBT 的阳性率为 2.0%。结论 从 FOBT 过渡到 FIT 产生了更高的摄取和阳性率,CRC 的 PPV 较低,腺瘤的 PPV 较高。FIT 试点评估低估了接受度和积极性。在与评估相同的阈值下引入 FIT 导致结肠镜检查需求增加 67.2%,而不是预测的 10%。
更新日期:2020-03-31
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