They found an increase in the density of sleep spindles -- bursts of electrical activity in the brain that are believed to play a significant role in memory consolidation, the process by which the brain takes newly acquired information and converts it to longer-term memory.
Energy usage is minimized by exploiting density estimation, sleeping modes and duty cycle control in a distributed and autonomous manner and as a function of the traffic intensity.
Stroke led to a significant reduction of EEG power density in NREM sleep throughout most of the frequency range (Fig. 2B).
*AOR, adjusted odds ratio (random intercept model (household), adjusting for age, sleeping density, proportion of household completing both visits); CI, confidence interval; GE, gastroenteritis.
The cohort consists predominately of Hispanic families with young children, including a median of 5 persons (range 2 20) per household and a median sleeping density of 2.5 persons/bedroom.
Interestingly, a recent study using a 256-electrode high-density EEG during sleep also observed a spindle deficit in patients with schizophrenia when compared to patients with depression and healthy control subjects [ 17].
Studies show that reasons may include perceptions of low mosquito density, changes in sleeping arrangements, difficulties in physically hanging ITNs, feeling hot or uncomfortable and a variety of other reasons [ 27- 30, 33- 43].
A random intercept logistic regression model (Proc Glimmix., SAS/Stat, 9.2 ed., SAS Institute, Cary, NC, USA) was used to model household clusters and to adjust for age, sleeping density, and proportion of household members completing both visits, each modeled as a continuous variable.
Households that did not complete the study were also more likely to have been referred through an emergency department (21% vs. 15%, p = 0.02) but were similar in number of children enrolled, primary household language, sleeping density, educational attainment, and prevalence of H. pylori infection.
When adjusted for age, sleeping density, and proportion of household contacts completing both visits, exposure to an H. pylori infected person with gastroenteritis increased risk for definite or probable new infection 4.8-fold (95% CI 1.4 17.1, p = 0.01) compared with exposure to infected persons without gastroenteritis.
