Statistics as Topic

Publication Title: 
Journal of Behavioral Medicine

Yoga has become increasingly popular in the US and around the world, yet because most yoga research is conducted as clinical trials or experiments, little is known about the characteristics and correlates of people who independently choose to practice yoga. We conducted a systematic review of this issue, identifying 55 studies and categorizing correlates of yoga practice into sociodemographics, psychosocial characteristics, and mental and physical well-being.

Author(s): 
Park, Crystal L.
Braun, Tosca
Siegel, Tamar
Publication Title: 
Nurse Researcher

AIM: To highlight from a doctoral student's perspective some of the unexpected and challenging issues that may arise when collecting data in a complex, qualitative study. BACKGROUND: Using a qualitative approach to undertaking a PhD requires commitment to the research topic, the acquisition of a variety of research skills and the development of expertise in writing. Despite close research supervision and guidance, the first author of this paper experienced unexpected hurdles when collecting data.

Author(s): 
Dowse, Eileen Mary
van der Riet, Pamela
Keatinge, Diana Rosemary
Publication Title: 
Journal of Behavioral Medicine

Yoga has become increasingly popular in the US and around the world, yet because most yoga research is conducted as clinical trials or experiments, little is known about the characteristics and correlates of people who independently choose to practice yoga. We conducted a systematic review of this issue, identifying 55 studies and categorizing correlates of yoga practice into sociodemographics, psychosocial characteristics, and mental and physical well-being.

Author(s): 
Park, Crystal L.
Braun, Tosca
Siegel, Tamar
Publication Title: 
Scandinavian Journal of Medicine & Science in Sports

Previous meta-analyses investigating the effect of exercise on depression have included trials where the control condition has been categorized as placebo despite the fact that this particular placebo intervention (e.g., meditation, relaxation) has been recognized as having an antidepressant effect. Because meditation and mindfulness-based interventions are associated with depression reduction, it is impossible to separate the effect of the physical exercise from the meditation-related parts.

Author(s): 
Josefsson, T.
Lindwall, M.
Archer, T.
Publication Title: 
Journal of Oral Rehabilitation

The aim of this systematic review was to assess the efficacy of acupuncture in the management of xerostomia. Assessing quality of studies aim to efficiently integrate valid information and provide a basis for sound decision making based on the best available evidence. Articles of controlled clinical trials evaluating the efficacy of acupuncture in the management of xerostomia were obtained by searching through the databases MEDLINE and Cochrane Central Register of Controlled Trials to September 2003.

Author(s): 
Jedel, E.
Publication Title: 
Journal of Clinical Epidemiology

OBJECTIVE: The goal of this study was to assess the quality of reporting of statistical methods in randomized clinical trials (RCTs), including identification of primary analyses, missing data accommodation, and multiplicity adjustment, in studies of nonpharmacologic, noninterventional pain treatments (e.g., physical therapy, cognitive behavioral therapy, acupuncture, and massage). STUDY DESIGN: Systematic review of 101 articles reporting RCTs of pain treatments that were published between January 2006 and June 2013 in the European Journal of Pain, the Journal of Pain, and Pain.

Author(s): 
Dworkin, Jordan D.
McKeown, Andrew
Farrar, John T.
Gilron, Ian
Hunsinger, Matthew
Kerns, Robert D.
McDermott, Michael P.
Rappaport, Bob A.
Turk, Dennis C.
Dworkin, Robert H.
Gewandter, Jennifer S.
Publication Title: 
Mechanisms of Ageing and Development

Accessible and readily utilized software, tables and approximation formulae have been developed to estimate power and sample size for studies of time to event (survival times) when the survival times are assumed to be exponential. These methods can markedly misestimate power when the distribution is Weibull and not exponential. The Weibull distribution with increasing hazard is common in aging research, especially when the whole life span of the subjects is of interest.

Author(s): 
Heo, M.
Faith, M. S.
Allison, D. B.
Publication Title: 
The International Journal of Biochemistry & Cell Biology

Calorie-restricted feeding retards the rate of ageing in mammalian and invertebrate species. The molecular mechanisms underlying this effect include a lower rate of accrual of tissue oxidative damage that is associated with a significantly lower rate of mitochondrial free radical generation in rodent species. To identify the important sites of control and regulation for mitochondrial free radical generation during ageing and calorie-restricted feeding, metabolic control analysis is being applied to the study of mitochondrial bioenergetics.

Author(s): 
Merry, B. J.
Publication Title: 
Molecular Psychiatry

Telomeres are DNA-protein complexes that cap linear DNA strands, protecting DNA from damage. When telomeres critically shorten, cells become susceptible to senescence and apoptosis. Telomerase, a cellular ribonucleoprotein enzyme, rebuilds the length of telomeres and promotes cellular viability. Leukocyte telomeres are reportedly shortened in major depression, but telomerase activity in depression has not been previously reported.

Author(s): 
Wolkowitz, O. M.
Mellon, S. H.
Epel, E. S.
Lin, J.
Reus, V. I.
Rosser, R.
Burke, H.
Compagnone, M.
Nelson, J. C.
Dhabhar, F. S.
Blackburn, E. H.
Publication Title: 
Psychoneuroendocrinology

Allostatic load, the physiological accumulation of the effects of chronic stressors, has been associated with multiple adverse health outcomes. Flattened diurnal cortisol rhythmicity is one of the prototypes of allostatic load, and has been shown to predict shorter survival among women with metastatic breast cancer. The current study compared diurnal cortisol slope in 17 breast cancer patients and 31 controls, and tested associations with variables previously found to be related to cortisol regulation, i.e, abdominal adiposity, perceived stress, social support, and explicit memory.

Author(s): 
Abercrombie, Heather C.
Giese-Davis, Janine
Sephton, Sandra
Epel, Elissa S.
Turner-Cobb, Julie M.
Spiegel, David

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