The odds ratio: a useful tool in neurosciences.

The Critical-Care Pain Observation Tool: A useful tool for pain assessment in intensive care units

Pain is a major concern in all intensive care units (ICUs). The proper assessment and management of pain is one of the main goals of patient care in ICUs. Improper evaluation of pain and its over or under treatment can cause significant problems in the process of patient management in ICU. Since most ICU patients are unable to communicate correctly with the ICU team and explain their level of p...

Informational Odds Ratio: A Useful Measure of Epidemiologic Association in Environment Exposure Studies

The informational odds ratio (IOR) measures the post-exposure odds divided by the pre-exposure odds (ie, information gained after knowing exposure status). A desirable property of an adjusted ratio estimate is collapsibility (ie, the combined crude ratio will not change after adjusting for a variable that is not a confounder). Adjusted traditional odds ratios (TORs) are not collapsible. In cont...

Statistics notes. The odds ratio.

In recent years odds ratios have become widely used in medical reports—almost certainly some will appear in today’s BMJ. There are three reasons for this. Firstly, they provide an estimate (with confidence interval) for the relationship between two binary (“yes or no”) variables. Secondly, they enable us to examine the effects of other variables on that relationship, using logistic regression. ...

Odds Ratio, Hazard Ratio and Relative Risk

Odds ratio (OR) is a statistic commonly encountered in professional or scientific medical literature. Most readers perceive it as relative risk (RR), although most of them do not know why that would be true. But since such perception is mostly correct, there is nothing (or almost nothing) wrong with that. It is nevertheless useful to be reminded now and then what is the relation between the rel...

Prevalence odds ratio v prevalence ratio.