Tag Archives: odds ratio

Case base study vs case control study

25 Jul

Unlike the case control studies the case base studies are well suited to the cross sectional extractions from the reimbursement data bases that we usually do.
The case base studies use the whole population of the database as a control group , including the subjects who are affected by the disease (ie the cases).
Thus, making no difference whether the subjects have the disease or not , the control group is far more easy to constitute.

Citation: Chui TT-T, Lee W-C (2013) A Regression-Based Method for Estimating Risks and Relative Risks in Case-Base Studies. PLoS ONE 8(12): e83275. doi:10.1371/journal.pone.0083275

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0083275#pone-0083275-g001

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Ratio

25 Dec

There are numerous ratios in epidemiology, some of them being called the probability ratio, the proportion ratio, or in studies of existing disease, the prevalence ratio. Others can be called Odds ratio or relative risk or prevalence rate ratios or also risk ratio and last but not least hazard ratio. All those ratios aim to assess the risk difference between two sets of binomial health data. Below I selected a few articles with the aim to understand who is who among all those ratios.

http://www.em-consulte.com/showarticlefile/157267/index.pdf

http://www.biomedcentral.com/content/pdf/1471-2288-8-9.pdf

http://www.medicine.ox.ac.uk/bandolier/painres/download/whatis/what_are_haz_ratios.pdf

http://jama.jamanetwork.com/article.aspx?articleid=188182

http://ije.oxfordjournals.org/content/26/1/220.full.pdf

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