Results 291 to 300 of about 1,571,635 (343)
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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Making Sense of Odds and Odds Ratios [PDF]
Obstetrics & Gynecology, 2008 Odds 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.
Kenneth F. Schulz, David A. Grimes
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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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Note on the Odds Ratio and the Probability Ratio [PDF]
Journal of Educational and Behavioral Statistics, 2000 This note compares the odds ratio with the probability ratio (relative risk). These quantities arise, for example, in the analysis of educational and social science data by means of logistic regression.
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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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European Journal of Obstetrics & Gynecology and Reproductive Biology, 1990
Cesarean section (CS) rates for primiparas, multiparas with and without previous CS were investigated in seven obstetrical settings. Despite the great diversity of global CS rates (5.3 to 17.4%), common CS odds ratios of 3.0 and 37 have been found for primiparas and multiparas with previous CS, respectively.
Gérard Bréart +2 more
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Cesarean section (CS) rates for primiparas, multiparas with and without previous CS were investigated in seven obstetrical settings. Despite the great diversity of global CS rates (5.3 to 17.4%), common CS odds ratios of 3.0 and 37 have been found for primiparas and multiparas with previous CS, respectively.
Gérard Bréart +2 more
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Estimation of cumulative odds ratios
Annals of Epidemiology, 2004Standard estimation of ordered odds ratios requires the constraint that the etiologic effects of exposure are homogenous across thresholds of the ordered response. We present a method to relax this often-unrealistic constraint.The kernel of the proposed method is the expansion of observed data into "person-thresholds." Using standard statistical ...
Stephen R. Cole +2 more
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Conflating odds ratio with "risk" [PDF]
BMJ, 2014 Donze and colleagues found a clinically relevant increased thrombosis complication rate in patients with preoperative systemic inflammation or sepsis.1 However, they used the “risk” of postoperative arterial and venous thromboses interchangeably with the odds ratio, which may …
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2016
Chapter 44 has reviewed odds ratios (ORs) for analyzing cross-tabs of two unpaired groups of patients. Sometimes a single group is assessed twice, and, then, we will obtain a cross-tab slightly different from the traditional unpaired cross-tabs. McNemar’s test must be applied for analyzing these kind of data (Chap. 48).
Aeilko H. Zwinderman, Ton J. Cleophas
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Chapter 44 has reviewed odds ratios (ORs) for analyzing cross-tabs of two unpaired groups of patients. Sometimes a single group is assessed twice, and, then, we will obtain a cross-tab slightly different from the traditional unpaired cross-tabs. McNemar’s test must be applied for analyzing these kind of data (Chap. 48).
Aeilko H. Zwinderman, Ton J. Cleophas
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BMJ, 2010
Researchers conducted a case-control study to investigate whether sleeping environment was associated with sudden infant death syndrome.1 The researchers aimed to include all cases of sudden unexpected death for infants aged between 7 and 364 days from five regions of England with a combined population of more than 17 million people.
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Researchers conducted a case-control study to investigate whether sleeping environment was associated with sudden infant death syndrome.1 The researchers aimed to include all cases of sudden unexpected death for infants aged between 7 and 364 days from five regions of England with a combined population of more than 17 million people.
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