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Making Sense of Odds and Odds Ratios
Obstetrics & Gynecology, 2008Odds and odds ratios are hard for many clinicians to understand. Odds are the probability of an event occurring divided by the probability of the event not occurring. An odds ratio is the odds of the event in one group, for example, those exposed to a drug, divided by the odds in another group not exposed.
David A, Grimes, Kenneth F, Schulz
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International Journal of Injury Control and Safety Promotion, 2010
Quantifying risk is an essential aspect in injury and safety research. Unfortunately, ‘risk,’ like many other words from technical jargon, is also used in common language, giving rise to misinterpr...
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Quantifying risk is an essential aspect in injury and safety research. Unfortunately, ‘risk,’ like many other words from technical jargon, is also used in common language, giving rise to misinterpr...
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BMJ, 2013
Researchers evaluated the efficacy of intravitreous injections of bevacizumab for the treatment of neovascular age related macular degeneration. A prospective, double blind, multicentre, randomised controlled trial study design was used. The intervention was intravitreous bevacizumab 1.25 mg, given as three loading injections at six week intervals and ...
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Researchers evaluated the efficacy of intravitreous injections of bevacizumab for the treatment of neovascular age related macular degeneration. A prospective, double blind, multicentre, randomised controlled trial study design was used. The intervention was intravitreous bevacizumab 1.25 mg, given as three loading injections at six week intervals and ...
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Risk ratios and odds ratios—what are they?
Midwifery, 2004A risk ratio (sometimes called relative risk, both abbreviated to RR) and an odds ratio (OR) are ways of expressing a comparison between two proportions. For example, in this paper, there are two randomised groups in the trial, women in the lateral position and women in the supported sitting position in the passive second stage of labour.
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American Journal of Orthodontics and Dentofacial Orthopedics, 2012
from which we can infer that if the risk or the probability of failure is low (P\0.1), then the OR is a good approximation of the RR, and they can be used interchangeably. If the risk of the events is high, then the OR and the RR cannot be used interchangeably, since they tend to be quite different because the risk is bounded by the values of 0 and 1 ...
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from which we can infer that if the risk or the probability of failure is low (P\0.1), then the OR is a good approximation of the RR, and they can be used interchangeably. If the risk of the events is high, then the OR and the RR cannot be used interchangeably, since they tend to be quite different because the risk is bounded by the values of 0 and 1 ...
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STATISTICAL BRIEFING: ODDS AND ODDS RATIOS
Veterinary Radiology & Ultrasound, 2008Christopher R, Lamb, Dirk, Pfeiffer
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