Browsing Bergen Open Research Archive by Author "Saxvig, Ingvild West"
Now showing items 1-6 of 6
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Circadian typology and implications for adolescent sleep health. Results from a large, cross-sectional, school-based study
Saxvig, Ingvild West; Evanger, Linn Nyjordet; Pallesen, Ståle; Hysing, Mari; Sivertsen, Børge; Gradisar, Michael; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2021)Study objectives To investigate circadian typology in a large, representative sample of Norwegian adolescents, and its implications for sleep health. Methods The sample included 3920 1st year high school students aged ... -
Delayed Sleep Phase Disorder. Prevalence, sleep, circadian rhythm and treatment
Saxvig, Ingvild West (Doctoral thesis; Peer reviewed, 2013-04-30)Adolescence is often characterized by delayed and irregular sleep patterns, with potential negative consequences in terms of school performance and daytime functioning. At the most extreme, a stably delayed sleep phase may ... -
Effect of dietary nitrate supplementation on sleep in chronic obstructive pulmonary disease patients
Wisor, Jonathan P.; Holmedahl, Nils Henrik; Saxvig, Ingvild West; Fjeldstad, Odd-Magne; Weitzberg, Eddie; Grønli, Janne; Engan, Harald Kåre (Journal article; Peer reviewed, 2021)Purpose: Poor sleep quality in chronic obstructive pulmonary disease (COPD) is a result of oxygen desaturation secondary to compromised lung function. Nitrate supplementation with dietary beetroot juice is known to elevate ... -
Psychosocial Challenges Related to Delayed Sleep Phase Disorder
Wilhelmsen-Langeland, Ane; Dundas, Ingrid; Saxvig, Ingvild West; Pallesen, Ståle; Nordhus, Inger Hilde; Bjorvatn, Bjørn (Journal article, 2012)Delayed sleep phase disorder (DSPD) is a disorder where the circadian rhythm is delayed according to the conventional norms, often resulting in school- and work related difficulties as well as emotional challenges. Research ... -
A randomized controlled trial with bright light and melatonin for treatment of delayed sleep phase disorder. Effects on subjective and objective sleepiness and cognitive function.
Wilhelmsen-Langeland, Ane; Saxvig, Ingvild West; Pallesen, Ståle; Nordhus, Inger Hilde; Vedaa, Øystein; Lundervold, Astri Johansen; Bjorvatn, Bjørn (Peer reviewed; Journal article, 2013-10)Delayed sleep phase disorder (DSPD) is a circadian rhythm sleep disorder. Patients with DSPD have problems initiating sleep if they go to bed at a conventional time and they often have problems waking at desired times. If ... -
Sleep during COVID-19-related school lockdown, a longitudinal study among high school students
Saxvig, Ingvild West; Pallesen, Ståle; Sivertsen, Børge; Hysing, Mari; Evanger, Linn Nyjordet; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2021)There has been great concern about the impact of coronavirus disease 2019 (COVID-19)-related school lockdown on adolescent health. The aim of the present study was to compare sleep patterns before and during COVID-19-related ...