The Prevalence of Positional Obstructive Sleep Apnoea in a Sample of the Saudi Population.

Purpose: Positional obstructive sleep apnoea (POSA) is of important clinical significance, as positional treatment can augment or obviate continuous positive airway pressure. This study aimed to determine the prevalence of POSA and its characteristics using different definitions.

Methods: We retrospectively examined a cohort of patients who underwent polysomnography (PSG) between 2013 and 2019 at two sleep centres.

Sleep quality and mental health in coronavirus disease 2019 patients and general population during the pandemic.

Objective: Sleep problems during the coronavirus disease 2019 (COVID-19) pandemic commonly affected general populations. Data on the effect of the COVID-19 pandemic on sleep quality in Saudi Arabia are scarce. Thus, the aim of our study was to evaluate sleep quality and assess the psychological burden of the pandemic in COVID-19 patients and the general population.

Sleep Disorders Among Commercial Airline Pilots.

Over the next 20 yr, international market expansion will necessitate the production of new commercial airplanes and the recruitment of additional crewmembers and technicians. Research has proven that fatigue and lack of sleep are risk factors for impaired cognitive performance and human error. Pilots frequently report fatigue to their employers, which may be related to sleep disturbance.

The correlation between oxygen saturation indices and the standard obstructive sleep apnea severity.

Objective: Currently accepted guidelines categorize obstructive sleep apnea (OSA) severity according to the Apnea-Hypopnea Index (AHI). However, it is unclear how to best define OSA severity. The present study sought to evaluate the concurrent validity of the widely accepted AHI by correlating it with various oxygen saturation (SpO) and polysomnographic parameters.

Prevalence of Glaucoma in Patients with Obstructive Sleep Apnea.

To determine the prevalence of glaucoma in obstructive sleep apnea (OSA) patients and compare it with that of patients without OSA. Patients investigated for OSA using polysomnography at the sleep center of King Abdulaziz University Hospital were invited to participate in this cross-sectional case series study. American Academy of Sleep Medicine guidelines were used to diagnose OSA.

Restless legs syndrome and sleep quality among adult sickle cell disease patients.

Objective: The purpose of this study is to determine and compare the prevalence of restless legs syndrome (RLS) between adult patients with sickle cell disease (SCD) and non-SCD anemia.

Methods: This cross-sectional study was conducted from December 2013 to July 2014. Patients with SCD and non-SCD anemia were recruited from a hematology clinic at a large university hospital.

Correction: Relative Metabolic Stability, but Disrupted Circadian Cortisol Secretion during the Fasting Month of Ramadan.

[This corrects the article on p. e60917 in vol. 8.

Relative metabolic stability, but disrupted circadian cortisol secretion during the fasting month of Ramadan.

Background: Chronic feeding and sleep schedule disturbances are stressors that exert damaging effects on the organism. Practicing Muslims in Saudi Arabia go through strict Ramadan fasting from dawn till sunset for one month yearly. Modern era Ramadan practices in Saudi Arabia are associated with disturbed feeding and sleep patterns, namely abstaining from food and water and increasing daytime sleep, and staying awake and receiving food and water till dawn.