Case controlCohortEPIDEMIOLOGYStudies the epidemiology of childhood cancer using case-control and cohort methods of investigation. Differences in the two methods; Calculation of odds ratio in case-control study and relative risks in cohort study; Advantages and disadvantages of the two methods.Bell...
A well-designed and properly analyzed case-control study is an efficient way of answering many questions. It is both faster and cheaper than a cohort study. The use and understanding of case-control studies are developments of modern epidemiology (Schlesselman, 1982; Miettinen, 1985). In a cas...
Risk Factors for Pneumonia in Urban-Dwelling HIV-Infected Women: A Case-Control Study in Nairobi, Kenya. Investigates the risk factors for pneumonia in a cohort of HIV-infected women in sub-Saharan Africa. Relations between pneumonia and HIV infection; Inciden... Penner,Jeremy,Meier,... - 《...
Statisticians have contributed enormously to the conceptualization, development, and success of case-control methods for the study of disease causation and prevention. This article reviews the major developments. It starts with Cornfield''s demonstration of odds ratio invariance under cohort versus case-...
A case–control study was conducted between September 2018 and March 2020, nested within an ongoing prospective cohort study recruiting adult (≥ 18 years) presumptive TB patients in the Temeke District of Dar-es-Salaam, Tanzania (TB DAR). To meet clinical team capacity constraints, the recrui...
Special challenges are involved when conducting primary case–control, cohort and related observational studies in older adults. While the challenges are not unique, there are a host of features that dominate such studies, including the recruitment of older adults into research studies, the ethical hu...
Characteristics of the study cohort are presented in Table 1. There was male dominance (58%) and the mean age was 67 years. More than half of the sepsis patients had a CCI of ≥ 2 compared to 18% in the control group. The most common comorbidities among the sepsis patients were ...
In this article, we review the features of a proper casecontrol study and contrast them with those of the more common cohort study. Confusing the control series of a cohort study with the 'controls' in a case-control study leads to serious problems with understanding the research, its ...
Case-Control StudiesCohort StudiesHypertensionMeta-Analysis as TopicRandomized Controlled Trials as TopicBackground: In the hierarchy of research designs, the ... Concato,John,Shah,... - 《New England Journal of Medicine》 被引量: 7570发表: 2000年 Observational versus experimental studies: what's...
In the present study, level of 4,4-DDE in the cancer versus control group was found to be 1.017 mg/kg vs. 0.019 mg/kg indicating a significant association of 4,4-DDE and risk of breast cancer. Residues of Endosulfan were also found significantly elevated in the cancer cases but...