نتایج جستجو برای: cross over effect

تعداد نتایج: 3034382  

2013
Mei-Sing Ong Farah Magrabi Jeffrey Post Sarah Morris Johanna Westbrook Wayne Wobcke Ross Calcroft Enrico Coiera

BACKGROUND Ineffective communication of infection control requirements during transitions of care is a potential cause of non-compliance with infection control precautions by healthcare personnel. In this study, interventions to enhance communication during inpatient transfers between wards and radiology were implemented, in the attempt to improve adherence to precautions during transfers. ME...

Journal: :Journal of evaluation in clinical practice 2017
Ariel Linden

RATIONALE, AIMS AND OBJECTIVES The basic single-group interrupted time series analysis (ITSA) design has been shown to be susceptible to the most common threat to validity-history-the possibility that some other event caused the observed effect in the time series. A single-group ITSA with a crossover design (in which the intervention is introduced and withdrawn 1 or more times) should be more r...

Journal: :Annals of surgery 2013
Robert J Fitzgibbons Bala Ramanan Shipra Arya Scott A Turner Xue Li James O Gibbs Domenic J Reda

OBJECTIVE To assess the long-term crossover (CO) rate in men undergoing watchful waiting (WW) as a primary treatment strategy for their asymptomatic or minimally symptomatic inguinal hernias. BACKGROUND With an average follow-up of 3.2 years, a randomized controlled trial comparing WW with routine repair for male patients with minimally symptomatic inguinal hernias led investigators to conclu...

2010
Luke E Berchowitz Gregory P Copenhaver

Meiosis is a dynamic process during which chromosomes undergo condensation, pairing, crossing-over and disjunction. Stringent regulation of the distribution and quantity of meiotic crossovers is critical for proper chromosome segregation in many organisms. In humans, aberrant crossover placement and the failure to faithfully segregate meiotic chromosomes often results in severe genetic disorder...

Journal: :International journal of epidemiology 2007
Dimitrios N Lathyris Thomas A Trikalinos John P A Ioannidis

BACKGROUND We aimed to evaluate empirically how crossover trial results are analysed in meta-analyses of randomized evidence and whether their results agree with parallel arm studies on the same questions. METHODS We used a systematic sample of Cochrane meta-analyses including crossover trials. We evaluated the methods of analysis for crossover results and compared the concordance of the esti...

2016
Alphy John Kavya Vinayan Jishy Varghese

Maintenance of the chromosomal copy number over generations and recombination between homologous chromosomes are hallmarks of meiotic cell division. This genetic exchange that take place during gamete formation leads to genetic diversity, the main driving force behind natural selection. Formation of chiasmata, the physical link between homologous chromosomes during meiosis, is a requisite for r...

Journal: :Trials 2009
Edward J Mills An-Wen Chan Ping Wu Andy Vail Gordon H Guyatt Douglas G Altman

OBJECTIVE Although crossover trials enjoy wide use, standards for analysis and reporting have not been established. We reviewed methodological aspects and quality of reporting in a representative sample of published crossover trials. METHODS We searched MEDLINE for December 2000 and identified all randomized crossover trials. We abstracted data independently, in duplicate, on 14 design criter...

2016
Trish A. Vandiver

The goal of the present study was to examine the relationship of social justice beliefs, gender, religiousness, and ethnicity on environmental attitudes among college students at a private university. Participants in the current research with higher scores on social justice measures also had higher scores on three environmental measures: attitudes toward the environment, conscientiousness about...

2016
Ann Morning

In 1997, the United States’ federal guidelines on racial classification were amended to permitindividual respondents to identify themselves as members of more than one race. This measure,taken at the urging of a vocal community of mixed-race individuals and organizations, was seenby many as having important consequences. In this article I examine the predictions about theimpact ...

2002
Arthur B. Kennickell

Surette for their important help in developing this revision to the structure of the SCF weights. The views expressed in this paper are those of the author alone and do not necessarily represent the opinions of the Board of Governors of the Federal Reserve System.

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