Prevalence and associations of insomnia after COVID-19 infection.

Study Objectives: Sleep disturbances in "long COVID" are common, but the associations between the severity of sleep problems and the severity of COVID infection are unclear. We evaluated the prevalence, persistence, comorbidities, and clinical effects of insomnia following recovery from acute COVID-19 infection in a COVID-specific clinic.

Methods: Inpatients discharged after COVID infection and outpatients referred for persistent post-COVID symptoms were surveyed on insomnia severity (Insomnia Severity Index, ISI), other neuropsychological symptoms, cardiopulmonary symptoms and physiological functions (6 minute walk distance and others), and functional outcome and quality of life (QOL).

Chronic Neurocognitive, Neuropsychological, and Pulmonary Symptoms in Outpatient and Inpatient Cohorts After COVID-19 Infection.

Neuropsychological symptoms associated with post-COVID-19 conditions may prevent patients from resuming normal activities at home or work. We report a retrospective, cross-sectional evaluation of neuropsychological and cardiopulmonary outcomes in 2 groups of patients: outpatients with mild enough infection to be spared from hospitalization and those who required inpatient admission. We hypothesized a dose-response model of post-COVID symptom severity in which persistent consequences would be more severe in those who experienced worse acute infections.

Determination of arsenic in ambient water at sub-part-per-trillion levels by hydride generation Pd coated platform collection and GFAAS detection.

A method for trace determination of total arsenic in ambient waters is described. Arsenic is separated on-line from a large volume water sample by hydride generation and purging, pre-collected on a Pd coated pyrolytic platform cuvette using a simple and inexpensive system, and finally detected by GFAAS. Instrument parameters, hydride generation, transportation, and collection were optimized.