variability


Also found in: Dictionary, Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to variability: Genetic variability, Climate variability

variability

a characteristic of SERVICES, namely that being delivered by people, the standard of their performance is open to variation.
References in periodicals archive ?
Doctors have known about this relationship for some time, but there has been very little research into why variability increases risk.
High heart rate variability shows that the heart is able to adapt to these changes.
Tingting Du, from the Huazhong University of Science and Technology in Wuhan, China, and colleagues evaluated whether or not intraindividual cardiovascular risk factor variability during childhood or adolescence is an independent predictor of later-life diabetes (mean follow-up, 20.5 years).
A high-resolution (0.11[degrees]) RCM large ensemble--the Canadian Regional Climate Model (CRCM5) Large Ensemble (CRCM5-LE)--was produced to study the effects of natural climate variability on hydrology and other local impacts.
Hence prevention of future cardiovascular events can be done by minimizing glycaemic variability. This article focuses on its various causes, its adverse impacts and briefly discusses various newer treatment options to reduce glycaemic variability.
Cardio scan premier 12 lux software was used for analysis of heart rate variability frequency domain parameters.
"Variability in metabolic parameters may be prognostic surrogate markers for predicting mortality and cardiovascular outcomes," wrote senior author Seung-Hwan Lee, MD, PhD, and professor of endocrinology at the College of Medicine of the Catholic University of Korea in Seoul, South Korea, and colleagues.
For the highest quartile in systolic BP variability, compared with the lowest, the risk of all-cause mortality increased by 19% (HR, 1.19; 95% CI, 1.16-1.22), MI by 7% (HR, 1.07; 95% CI, 1.03-1.11), and stroke by 14% (HR, 1.14; 95% CI, 1.10-1.18).
"In this study, we tried to answer the question of how the variability of these connects with the physical properties of the supermassive black hole," Sanchez added in the statement.
Low heart rate variability is associated with a 3245% higher risk of a first cardiovascular event.
While other measures of variability exist, such as autocorrelations (Maes, 2003), conditional probability (Machado, 1992; Stokes, 1995), and Markov chain analysis (Machado, 1992, 1993, 1997), U-value has been most commonly used in studies to assess the level of variability in responses where frequencies of the responses or response categories can be measured (e.g., Denney & Neuringer, 1998; Doolan & Bizo, 2013; Grunow & Neuringer, 2002; Hopkinson & Neuringer, 2003; Maes, 2003; Murray & Healy, 2013; Neuringer, 2002; Neuringer & Huntley, 1991; Page & Neuringer, 1985; Ross & Neuringer, 2002; Souza, Abreu-Rodrigues, & Baumann, 2010; Stokes 1995; Ward, Kynaston, Bailey, & Odum, 2008).
The heart is not a metronome and its beats lack the regularity of a clock, thus HR changes defined as heart rate variability (HRV) are normal.