Browsing NTNU Open by Author "Lydersen, Stian"
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A conservative weight loss intervention relieves bowel symptoms in morbidly obese subjects with irritable bowel syndrome: a prospective cohort study
Aasbrenn, Martin; Lydersen, Stian; Farup, Per Grønaas (Journal article; Peer reviewed, 2018)Background. Irritable bowel syndrome (IBS) is common in subjects with morbid obesity; the effect of weight loss programs on bowel symptoms is largely unknown. Methods. This prospective cohort study explored bowel symptoms, ... -
A longitudinal study of associations between psychiatric symptoms and disorders and cerebral gray matter volumes in adolescents born very preterm
Lozano-Botellero, Violeta Nazaret; Skranes, Jon Sverre; Bjuland, Knut Jørgen; Håberg, Asta; Lydersen, Stian; Brubakk, Ann-Mari; Indredavik, Marit Sæbø; Martinussen, Marit (Journal article; Peer reviewed, 2017)Background:Being born preterm with very low birthweight (VLBW≤1500 g) poses a risk for cortical andsubcortical gray matter (GM) abnormalities, as well as for having more psychiatric problems during childhood andadolescence ... -
A physical activity intervention to prevent cognitive decline after stroke – Secondary results from the LAST (Life After Stroke) study. An 18-month randomised controlled trial.
Ihle-Hansen, Hege; Langhammer, Birgitta; Lydersen, Stian; Gunnes, Mari; Indredavik, Bent; Askim, Torunn (Journal article; Peer reviewed, 2019)Objective: To examine the effects of individualized regular coaching and exercise on post-stroke cognitive and emotional function. Methods: The Life After STroke (LAST) study investigated the differences between intervention ... -
A pragmatic effectiveness randomized controlled trial of the duration of psychiatric hospitalization in a trans- diagnostic sample of patients with acute mental illness admitted to a ward with either blue-depleted evening lighting or normal lighting conditions
Scott, Janine Linda; Langsrud, Knut; Vethe, Daniel; Kjørstad, Kaia; Vestergaard, Cecilie Lund; Faaland, Patrick; Lydersen, Stian; Vaaler, Arne; Morken, Gunnar; Torgersen, Terje; Kallestad, Håvard (Journal article; Peer reviewed, 2019)Background There is increasing recognition of the need to stabilize sleep-wake cycles in individuals with major mental disorders. As such, clinicians and researchers advocate the use of interventions targeted at sleep and ... -
A reliability study of the rapid emergency triage and treatment system for children
Henning, Brita; Lydersen, Stian; Døllner, Henrik (Journal article; Peer reviewed, 2016-02-24)Background To evaluate inter- and intrarater reliability of a new Scandinavian triage system for children, the Rapid Emergency Triage and Treatment System-pediatric (RETTS-p). Methods Two observational studies ... -
Adherence to a Long-Term Physical Activity and Exercise Program After Stroke Applied in a Randomized Controlled Trial
Gunnes, Mari; Langhammer, Birgitta; Aamot, Inger Lise; Lydersen, Stian; Ihle-Hansen, Hege; Indredavik, Bent; Reneflot, Kristine Helen; Schroeter, Walburga; Askim, Torunn (Journal article; Peer reviewed, 2018)Background Persistent physical activity is important to maintain motor function across all stages after stroke. Objective The objective of this study was to investigate adherence to an 18-month physical activity and ... -
Age of First Walking and Associations with Symptom Severity in Children with Suspected or Diagnosed Autism Spectrum Disorder
Reindal, Lise; Nærland, Terje; Weidle, Bernhard; Lydersen, Stian; Andreassen, Ole Andreas; Sund, Anne Mari (Journal article; Peer reviewed, 2019)Age of first walking (AOW) is reported to be later in autism spectrum disorder (ASD) compared with typical development. However, the relationship between AOW and variations in ASD symptoms across different neurodevelopmental ... -
Analysis of Longitudinal Data with Missing Values.: Methods and Applications in Medical Statistics.
Dragset, Ingrid Garli (Master thesis, 2009)Missing data is a concept used to describe the values that are, for some reason, not observed in datasets. Most standard analysis methods are not feasible for datasets with missing values. The methods handling missing data ... -
APOE ε4 lowers age at onset and is a high risk factor for Alzheimer's disease; a case control study from central Norway
Sando, Sigrid Botne; Melquist, Stacey; Cannon, Ashley; Hutton, Michael; Sletvold, Olav; Saltvedt, Ingvild; White, Linda; Lydersen, Stian; Aasly, Jan (Journal article; Peer reviewed, 2008)Background: The objective of this study was to analyze factors influencing the risk and timing of Alzheimer's disease (AD) in central Norway. The APOE ε4 allele is the only consistently identified risk factor for late ... -
Are Nonnutritive Sweeteners Obesogenic? Associations between Diet, Faecal Microbiota, and Short-Chain Fatty Acids in Morbidly Obese Subjects
Farup, Per Grønaas; Lydersen, Stian; Valeur, Jørgen (Journal article; Peer reviewed, 2019)Obesity has been associated with changes in the gut microbiota and its metabolites. The study explored changes in the faecal microbiota and short-chain fatty acids (SCFA) associated with the diet (including nonnutritive ... -
Associations between parental chronic pain and self-esteem, social competence, and family cohesion in adolescent girls and boys - Family linkage data from the HUNT study
Kaasbøll, Jannike; Ranøyen, Ingunn; Nilsen, Wendy; Lydersen, Stian; Indredavik, Marit Sæbø (Journal article; Peer reviewed, 2015)Background: Parental chronic pain has been associated with adverse outcomes in offspring. However, knowledge on individual and family resilience factors in adolescent offspring of chronic pain sufferers is scarce. This ... -
Atypical event-related potentials revealed during the passive parts of a Go-NoGo task in autism spectrum disorder a case-control study
Høyland, Anne Lise; Nærland, Terje; Engstrøm, Morten; Torske, Tonje; Lydersen, Stian; Andreassen, Ole Andreas (Journal article; Peer reviewed, 2019)Background The core features of autism spectrum disorder (ASD) are easily recognizable in non-structured clinical and real-life situations. The features are often difficult to capture in structured laboratory settings, ... -
Burden of bloodstream infection in an area of Mid-Norway 2002-2013: A prospective population-based observational study
Mehl, Arne; Åsvold, Bjørn Olav; Lydersen, Stian; Paulsen, Julie; Solligård, Erik; Damås, Jan Kristian; Harthug, Stig; Edna, Tom-Harald (Journal article; Peer reviewed, 2017)Background Studies from several countries indicate that the incidence and mortality of bloodstream infection (BSI) have been increasing over time. Methods We studied the burden of disease and death related to BSI in ... -
Changes in BMI-distribution from 1966-69 to 1995-97 in adolescents. The Young-HUNT study, Norway
Bjørnelv, Sigrid; Lydersen, Stian; Mykletun, Arnstein; Holmen, Turid Lingaas (Journal article; Peer reviewed, 2007)Background: The aim of this study was to explore changes in the BMI-distribution over time among Norwegian adolescents. Methods: Height and weight were measured in standardised ways and BMI computed in 6774 adolescents ... -
Child exposure to serious life events, COMT, and aggression: Testing differential susceptibility theory
Hygen, Beate Wold; Belsky, Jay; Stenseng, Frode; Lydersen, Stian; Guzey, Ismail Cuneyt; Wichstrøm, Lars (Journal article; Peer reviewed, 2015)Both genetic and environmental factors contribute to individual differences in aggression. Catechol-O-methyltransferase Val158Met (COMT), a common, functional polymorphism, has been implicated in aggression and aggression ... -
Child maltreatment and quality of life: A study of adolescents in residential care
Greger, Hanne Klæboe; Myhre, Arne Kristian; Lydersen, Stian; Jozefiak, Thomas (Journal article; Peer reviewed, 2016)Background Childhood maltreatment is an important risk factor for mental and physical health problems. Adolescents living in residential youth care (RYC) have experienced a high rate of childhood maltreatment and are a ... -
Chronic pain and pain-related disability across psychiatric disorders in a clinical adolescent sample
Mangerud, Wenche Langfjord; Bjerkeset, Ottar; Lydersen, Stian; Indredavik, Marit Sæbø (Journal article; Peer reviewed, 2013)Background: People who suffer from psychiatric disorders are burdened with a high prevalence of chronic illnesses and pain, but evidence on pain prevalence among adolescents with psychiatric disorders is scarce. The aim ... -
Cognitive-behavioural group therapy for adolescents with ADHD: study protocol for a randomised controlled trial
Nøvik, Torunn Stene; Haugan, Anne-Lise; Lydersen, Stian; Thomsen, Per Hove; Young, Susan; Sund, Anne Mari (Peer reviewed; Journal article, 2020)Introduction Persistence of attention deficit hyperactivity disorder (ADHD) into adolescence is a significant burden to patients. Clinical guidelines recommend non-pharmacological therapies, but the evidence to support ... -
Comorbidities in cerebral palsy: a patient registry study
Hollung, Sandra Julsen; Bakken, Inger Johanne Landsjøåsen; Vik, Torstein; Lydersen, Stian; Wiik, Robert; Aaberg, Kari Modalsli; Andersen, Guro Lillemoen (Journal article; Peer reviewed, 2019)Aim To describe the total burden of disease in individuals with cerebral palsy (CP) in Norway. Method A comprehensive set of disorder categories were extracted from the Norwegian Patient Registry using International ... -
Comparison of driving simulator performance with real driving after alcohol intake: A randomised, single blind, placebo-controlled, cross-over trial
Helland, Arne; Jenssen, Gunnar Deinboll; Lervåg, Lone-Eirin; Westin, Andreas Austgulen; Moen, Terje; Sakshaug, Kristian; Lydersen, Stian; Mørland, Jørg; Slørdal, Lars (Journal article; Peer reviewed, 2013)The purpose of this study was to establish and validate a driving simulator method for assessing drug effects on driving. To achieve this, we used ethanol as a positive control, and examined whether ethanol affects driving ...