Results 21 to 30 of about 214,379 (306)

A novel weighting method to remove bias from within-subject exposure dependency in case-crossover studies

open access: yesBMC Medical Research Methodology, 2021
Background Case-crossover studies have been widely used in various fields including pharmacoepidemiology. Vines and Farrington indicated in 2001 that when within-subject exposure dependency exists, conditional logistic regression can be biased.
Kiyoshi Kubota   +5 more
doaj   +1 more source

Equal ratio ventilation (1:1) improves arterial oxygenation during laparoscopic bariatric surgery: A crossover study

open access: yesSaudi Journal of Anaesthesia, 2013
Background: Hypoxaemia and high peak airway pressure (Ppeak) are common anesthetic problems during laparoscopic bariatric surgery. Several publications have reported the successful improvement in arterial oxygenation using positive end expiratory ...
Wesam Farid Mousa
doaj   +1 more source

Regional versus systemic dexmedetomidine as an adjuvant to lidocaine for intravenous regional anaesthesia in healthy volunteers: a randomized crossover study

open access: yesAnnals of Medicine, 2023
Background Dexmedetomidine enhances the quality and duration of lidocaine intravenous regional anaesthesia (IVRA). However, the two administration routes have not been directly compared regarding effects on tourniquet tolerance time with lidocaine IVRA ...
Xincheng Liao   +5 more
doaj   +1 more source

Efficacy of the Orally Disintegrating Strip Sildenafil for the Treatment of Erectile Dysfunction: A Prospective, Randomized Trial

open access: yesSexual Medicine, 2021
: Introduction: Phosphodiesterase 5 inhibitors are the predominant treatment option for erectile dysfunction. Aim: This study evaluates the efficacy and safety of sildenafil orally disintegrating strips for the treatment of erectile dysfunction. Methods:
Premsant Sangkum, MD   +7 more
doaj   +1 more source

Bioequivalence Study of Two Tablet Formulations of Clonazepam 2 mg: A Randomized, Open-Label, Crossover Study in Healthy Mexican Volunteers Under Fasting Conditions

open access: yesNeurology and Therapy, 2023
Introduction The prevalence of neurological disorders is high among the Mexican population. Clonazepam is primarily indicated to treat panic disorders, certain kinds of epilepsy such as status epilepticus, childhood motor seizures (petit mal absence ...
Luis Genis-Najera   +1 more
doaj   +1 more source

Caffeine supplementation improves physical performance without affecting fatigue level: a double-blind crossover study. [PDF]

open access: yes, 2021
This study examined the effect of caffeine supplementation (CAFF) in a Wingate test (WT), and the behaviour of blood lactate concentrations (BLa) and neuromuscular fatigue (NMF), measured as reduced countermovement jump (CMJ) performance, in response ...
Silva, Sandro F. da   +15 more
core   +1 more source

Increase of 4-Hydroxybenzoic, a Bioactive Phenolic Compound, after an Organic Intervention Diet

open access: yesAntioxidants, 2019
Consumption of organic products is increasing yearly due to perceived health-promoting qualities. Several studies have shown higher amounts of phytochemicals such as polyphenols and carotenoids in foods produced by this type of agriculture than in ...
Sara Hurtado-Barroso   +5 more
doaj   +1 more source

Acute exposure to air pollutants increase the risk of acute glaucoma

open access: yesBMC Public Health, 2022
Background Ambient air pollution is related to the onset and progression of ocular disease. However, the effect of air pollutants on the acute glaucoma remains unclear.
Liping Li   +7 more
doaj   +1 more source

The use of baseline covariates in crossover studies [PDF]

open access: yesBiostatistics, 2009
It is our experience that in many settings, crossover trials that have within-period baseline measurements are analyzed wrongly. A "conventional" analysis of covariance in this setting uses each baseline as a covariate for the following outcome variable in the same period but not for any other outcome.
Kenward, Michael G., Roger, James H.
openaire   +3 more sources

A crossover study of short daily haemodialysis [PDF]

open access: yesNephrology Dialysis Transplantation, 2005
The benefits of daily haemodialysis (DHD) compared to conventional three times per week haemodialysis (CHD) have been described in a number of observational studies. Most of these previous studies however have not been performed with rigorous controls.We performed a crossover study following an A-B-A design: phase A was 4 weeks of thrice weekly ...
Alexander S, Goldfarb-Rumyantzev   +4 more
openaire   +2 more sources

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