Results 11 to 20 of about 3,571,431 (286)
Limitations of the incidence density ratio as approximation of the hazard ratio. [PDF]
Trials, 2019 Incidence density ratios (IDRs) are frequently used to account for varying follow-up times when comparing the risks of adverse events in two treatment groups. The validity of the IDR as approximation of the hazard ratio (HR) is unknown in the situation of differential average follow up by treatment group and non-constant hazard functions. Thus, the use
Bender R, Beckmann L.
europepmc +5 more sources
The Hazards of Period Specific and Weighted Hazard Ratios
Statistics in Biopharmaceutical Research, 2020 How to adequately handle nonproportional hazards (NPH) in clinical trials is an important and timely question, particularly given recent advances in immuno-oncology treatments, in which survival cu...
Jonathan W. Bartlett +5 more
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Российский кардиологический журнал, 2021 The absence of consensus regarding the reference values of right ventricular free wall longitudinal strain (RVFWLS) and its predictive value prompted us to conduct a systematic review and meta-analysis of publications on the predictive role of this ...
E. Z. Golukhova +6 more
doaj +1 more source
Российский кардиологический журнал, 2016 Aim. To determine the effects of stress at workplace on the risks (HR: hazard ratio) of development of myocardial infarction and stroke in open population of 25-64-yearold women in Russia/Siberia (Novosibirsk).Material and methods.
V. Gafarov +4 more
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The Hazard Ratio Is Equivalent to an Odds Under the Assumption of Proportional Hazards. [PDF]
J Patient Cent Res RevClinicians routinely interpret statistical findings from medical research to inform patients of treatment benefits. Studies that use the hazard ratio present special challenges. Clinicians should not equate hazard ratios with risk ratios, ie, relative risks.
Thompson DM.
europepmc +4 more sources
Hazard Ratio in Clinical Trials [PDF]
Antimicrobial Agents and Chemotherapy, 2004 Time-to-event curves analyzed by Cox proportional hazards regression are commonly used to describe the outcome of drug studies. This methodology has the advantage of using all available information, including patients who fail to complete the trial, such as in cancer chemotherapy or human immunodeficiency virus antiviral treatment studies.
Spotswood L, Spruance +3 more
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What’s the Risk: Differentiating Risk Ratios, Odds Ratios, and Hazard Ratios? [PDF]
Cureus, 2020 Risk ratios, odds ratios, and hazard ratios are three common, but often misused, statistical measures in clinical research. In this paper, the authors dissect what each of these terms define, and provide examples from the medical literature to illustrate each of these statistical measures.
George, Andrew +2 more
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Survival analysis: Part I — analysis of time-to-event [PDF]
Korean Journal of Anesthesiology, 2018 Length of time is a variable often encountered during data analysis. Survival analysis provides simple, intuitive results concerning time-to-event for events of interest, which are not confined to death.
Junyong In, Dong Kyu Lee
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Frontiers in Microbiology, 2016 Lettuce drop, caused by the soil borne pathogen Sclerotinia sclerotiorum, is one of the most common and serious diseases of lettuce worldwide. Increased concerns about the side effects of chemical pesticides have resulted in greater interest in ...
Xiaoyulong eChen +7 more
doaj +1 more source
Indian Journal of Respiratory Care, 2020 Background: Conflicting data suggest that Vitamin D reduces the risk of developing chronic obstructive pulmonary disease (COPD) and COPD exacerbations. Scant data are available regarding the Vitamin D status in patients with COPD in India where Vitamin D
Mohammad Ramzan Bhat +3 more
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