Tag Archives: relative risk

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.

Click to access index.pdf

Click to access 1471-2288-8-9.pdf

Click to access what_are_haz_ratios.pdf

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

Click to access 220.full.pdf

A scientific speech addressed to medical journalists

21 Apr

When Gary Schwitzer talks at a health care journalists congress the result is the below brilliant course of medical research methodology.

The way health care journalists report the lowering of risk linked to a medical or pharmaceutical intervention has an impact on the size of the interest the public will give to the so-called innovative therapy. The example chosen by Gary with Nolvadex and breast cancer risk is very striking (see slide 36).

Thank you Gary Schwitzer for this very informative lecture which benefits not only to journalists but also to health care consumers (i.e. all of us).

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