因为RCT也是先对研究对象分组，再前瞻性地观察结局的发生情况。因此，RCT中RR的解释和队列研究中是一样...
量化关联性另外一个统计量是相对风险值RR(Relative Risk) ，对比OR定义中的表格，其定义如下 $RR = \...
A case-control study evaluating relative risk factors for decompression sickness: A research reportdecompression sicknessdivingrisk factorodds ratiologistic regressionBackground: Factors contributing to the pathogenesis of decompression sickness (DCS) in divers have been described in many studies. However, ...
A case-control study of in relation to exposure to in homes in Winnipeg, Manitoba, Canada, was conducted during 1983-1990. In total, 738 individuals with histologically confirmed incident cases of were interviewed, along with 738 controls matched on age (+/- 5 years) and sex. dosimeters wer...
Several case–control studies reported a small raised risk of melanoma associated with some aspects of sunbed exposure 14, 15, 16, 17, 18, 19, whilst others have found no such association 6, 12, 20, 21. This case–control study of melanoma was conducted in the North East Thames region ...
This is a nation-wide multi-hospital-based case–control study. The present study was conducted using data from the Inpatient Clinico-Occupational Survey, which has been conducted by the Rosai Hospital Group since 1984. The details of this survey have been described elsewhere4,9,10. Briefly, th...
case-controlstudy也称回顾性研究(retrospectivestudy)病例对照研究㈠概念:是用来探索病因的一种流行病学研究方法。它是在病例组与对照组中进行比较,即调查两组人群过去暴露于某种或某些可疑危险因素的比例,判断该暴露是否与该病有关联及其关联程度大小的一种观察性研究方法。如果病例组有暴露史的比例或暴露程度显著高于...
livestock (presence/absence, numbers and density of each species) and the risk of STEC notification in all meshblocks of New Zealand was assessed. In essence, this analysis used the cases from the case–control study, but extended the control set to consider the entire population of New ...
医学统计学课件：CASE-CONTROL STUDIES CASE-CONTROLSTUDIES 这是神马研究？Cross-sectionalstudy Criticaldesignissue:Directionality Directionalitydefineswhenexposurevariableisobservedrelativeintimetowhenthehealthoutcomeisobserved Time BackwarddirectionalstudyDisease Comparespreviousexposuresinpersonswithandwithoutthedisease Expos...
The case-control approach has been proposed for the evaluation of the efficacy of screening for cancer. It provides information at the level of the individual subject and allows direct estimation of the relative risk of not being screene... AJ Sasco,NE Day,SD Walter - 《Journal of Chronic ...