scholarly journals Inverse U-shaped Association between Sleep Duration and Semen Quality: Longitudinal Observational Study (MARHCS) in Chongqing, China

SLEEP ◽  
2016 ◽  
Vol 39 (1) ◽  
pp. 79-86 ◽  
Author(s):  
Qing Chen ◽  
Huan Yang ◽  
Niya Zhou ◽  
Lei Sun ◽  
Huaqiong Bao ◽  
...  
Keyword(s):  
Observational Study ◽  
Sleep Duration ◽  
Semen Quality ◽  
Longitudinal Observational Study

scholarly journals Later sleep timing predicts accelerated summer weight gain among elementary school children: a prospective observational study

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Jennette P. Moreno ◽  
Javad Razjouyan ◽  
Houston Lester ◽  
Hafza Dadabhoy ◽  
Mona Amirmazaheri ◽  
...  
Keyword(s):  
Physical Activity ◽  
Observational Study ◽  
Sleep Duration ◽  
Obesity Prevention ◽  
Prospective Observational Study ◽  
Light Exposure ◽  
Activity Level ◽  
Activity Levels ◽  
School Year ◽  
Children’S Sleep

Abstract Objectives and background Social demands of the school-year and summer environment may affect children’s sleep patterns and circadian rhythms during these periods. The current study examined differences in children’s sleep and circadian-related behaviors during the school-year and summer and explored the association between sleep and circadian parameters and change in body mass index (BMI) during these time periods. Methods This was a prospective observational study with 119 children ages 5 to 8 years with three sequential BMI assessments: early school-year (fall), late school-year (spring), and beginning of the following school-year in Houston, Texas, USA. Sleep midpoint, sleep duration, variability of sleep midpoint, physical activity, and light exposure were estimated using wrist-worn accelerometry during the school-year (fall) and summer. To examine the effect of sleep parameters, physical activity level, and light exposure on change in BMI, growth curve modeling was conducted controlling for age, race, sex, and chronotype. Results Children’s sleep midpoint shifted later by an average of 1.5 h during summer compared to the school-year. After controlling for covariates, later sleep midpoints predicted larger increases in BMI during summer, (γ = .0004, p = .03), but not during the school-year. Sleep duration, sleep midpoint variability, physical activity levels, and sedentary behavior were not associated with change in BMI during the school-year or summer. Females tended to increase their BMI at a faster rate during summer compared to males, γ = .06, p = .049. Greater amounts of outdoor light exposure (γ = −.01, p = .02) predicted smaller increases in school-year BMI. Conclusions Obesity prevention interventions may need to target different behaviors depending on whether children are in or out of school. Promotion of outdoor time during the school-year and earlier sleep times during the summer may be effective obesity prevention strategies during these respective times.

scholarly journals The effect of COVID-19 pandemic and lockdown on consultation numbers, consultation reasons and performed services in primary care: results of a longitudinal observational study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Ingmar Schäfer ◽  
Heike Hansen ◽  
Agata Menzel ◽  
Marion Eisele ◽  
Daniel Tajdar ◽  
...  
Keyword(s):  
Primary Care ◽  
Observational Study ◽  
Rural Areas ◽  
Longitudinal Observational Study ◽  
Multivariable Analyses ◽  
Gastrointestinal Complaints ◽  
Urban And Rural Areas ◽  
Quota Sampling ◽  
Primary Care Practices

Abstract Objectives The aims of our study were to describe the effect of the COVID-19 pandemic and lockdown on primary care in Germany regarding the number of consultations, the prevalence of specific reasons for consultation presented by the patients, and the frequency of specific services performed by the GP. Methods We conducted a longitudinal observational study based on standardised GP interviews in a quota sampling design comparing the time before the COVID-19 pandemic (12 June 2015 to 27 April 2017) with the time during lockdown (21 April to 14 July 2020). The sample included GPs in urban and rural areas 120 km around Hamburg, Germany, and was stratified by region type and administrative districts. Differences in the consultation numbers were analysed by multivariate linear regressions in mixed models adjusted for random effects on the levels of the administrative districts and GP practices. Results One hundred ten GPs participated in the follow-up, corresponding to 52.1% of the baseline. Primary care practices in 32 of the 37 selected administrative districts (86.5%) could be represented in both assessments. At baseline, GPs reported 199.6 ± 96.9 consultations per week, which was significantly reduced during COVID-19 lockdown by 49.0% to 101.8 ± 67.6 consultations per week (p < 0.001). During lockdown, the frequency of five reasons for consultation (-43.0% to -31.5%) and eleven services (-56.6% to -33.5%) had significantly decreased. The multilevel, multivariable analyses showed an average reduction of 94.6 consultations per week (p < 0.001). Conclusions We observed a dramatic reduction of the number of consultations in primary care. This effect was independent of age, sex and specialty of the GP and independent of the practice location in urban or rural areas. Consultations for complaints like low back pain, gastrointestinal complaints, vertigo or fatigue and services like house calls/calls at nursing homes, wound treatments, pain therapy or screening examinations for the early detection of chronic diseases were particularly affected.

Enhancing the Social Interaction Skills of Preschoolers with Visual Impairments

2002 ◽  
Vol 96 (8) ◽  
pp. 576-584 ◽  
Author(s):  
Tana D'Allura
Keyword(s):  
Social Interaction ◽  
Observational Study ◽  
Learning Strategies ◽  
Learning Strategy ◽  
Visual Impairments ◽  
Interaction Patterns ◽  
Longitudinal Observational Study ◽  
The Social ◽  
Social Interaction Skills ◽  
Children With Visual Impairments

This longitudinal, observational study of 13 children in a preschool for children with visual impairments examined the effects of reverse mainstreaming, in combination with the cooperative learning strategy, on the social interaction patterns of preschoolers with and without visual impairments. It found that the type of environment provided and the learning strategies used affect both whether and how children relate to their environment.

scholarly journals Impact of tobacco outlet density and proximity on smoking cessation: A longitudinal observational study in two English cities

2014 ◽  
Vol 27 ◽  
pp. 45-50 ◽  
Author(s):  
Tha Han ◽  
Myriam Alexander ◽  
Aphrodite Niggebrugge ◽  
Gareth J. Hollands ◽  
Theresa M. Marteau
Keyword(s):  
Smoking Cessation ◽  
Observational Study ◽  
Longitudinal Observational Study ◽  
Outlet Density

A longitudinal observational study in two cats naturally-infected with hepadnavirus

2021 ◽  
Vol 254 ◽  
pp. 108999
Author(s):  
Paolo Capozza ◽  
Gianvito Lanave ◽  
Georgia Diakoudi ◽  
Fabio Stasi ◽  
Paola Ghergo ◽  
...  
Keyword(s):  
Observational Study ◽  
Longitudinal Observational Study
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