Vitenskapelig artikkel

• Andersen, Amanda Iselin Olesen; Knapstad, Marit; Smith, Otto Robert Frans (2025). Can registry-based auxiliary variables improve handling of missing outcome data in mental health trials? Evidence from a registry-linked randomized study. (ekstern lenke)
• Smith, Robert; Knapstad, Marit; Aarø, Leif Edvard (2025). Do we need two hammers in our toolbox? An empirical note about the potential redundancy of measuring subjective quality of life. (ekstern lenke)
• Nilsen, Thomas Sevenius; Knapstad, Marit; Skogen, Jens Christoffer et al. (2025). Non-response bias in the Norwegian Counties Public Health Survey: Insights from linkage to register data. (ekstern lenke)
• Smith, Otto Robert Frans; Knapstad, Marit; Aarø, Leif Edvard (2025). Minimizing patient burden in outcome monitoring: The case for abbreviated versions of PHQ-9, GAD-7 and WSAS. (ekstern lenke)
• Smith, Otto Robert Frans; Clark, David M.; Hensing, Gunnel et al. (2025). Cost-benefit of IAPT Norway and effects on work-related outcomes and health care utilization: Results from a randomized controlled trial using registry-based data. (ekstern lenke)
• Hakvaag, Tonje Catrin; Knapstad, Marit; Tjora, Tore (2025). Office Level Variation in Benefit Duration for Service Users Receiving Work Assessment Allowance: A Norwegian Longitudinal Multilevel Register Study. (ekstern lenke)
• Knapstad, Marit; Lissner, Lauren; Björkelund, Cecilia et al. (2025). Mental stress due to poor organizational climate and high work commitment as predictor of 10-year registered sickness absence: a cohort study based on The Population Study of Women in Gothenburg. (ekstern lenke)
• Aarø, Leif Edvard; Smith, Otto Robert; Damsgaard, Mogens Trab et al. (2025). Four scales measuring mental wellbeing in the Nordic countries: do they tell the same story?. (ekstern lenke)
• Aarø, Leif Edvard; Knapstad, Marit; Smith, Otto Robert Frans (2025). Positive mental wellbeing or symptoms of depression? Discriminant validity of the Warwick-Edinburgh Mental Wellbeing Scale. (ekstern lenke)
• Sivertsen, Børge; Skogen, Jens Christoffer; Reneflot, Anne et al. (2024). Assessing Diagnostic Precision: Adaptations of the Hopkins Symptom Checklist (HSCL-5/10/25) Among Tertiary-Level Students in Norway. (ekstern lenke)
• Aarø, Leif Edvard; Knapstad, Marit; Nilsen, Thomas Sevenius et al. (2024). The Norwegian Counties Public Health Survey (NCPHS): a design study. (ekstern lenke)
• Hanevik, Elin; Røvik, Frida M. G.; Bøe, Tormod et al. (2023). Client predictors of therapy dropout in a primary care setting: a prospective cohort study. (ekstern lenke)
• Smith, Otto Robert Frans; Aarø, Leif Edvard; Knapstad, Marit (2023). The Importance of Symptom Reduction for Functional Improvement after Cognitive Behavioral Therapy for Anxiety and Depression: A Causal Mediation Analysis. (ekstern lenke)
• Aarø, Leif Edvard; Leino, Tony Mathias; Vedaa, Øystein et al. (2023). Behavioural precautions to avoid transmission of the COVID-19 virus – low educated groups are not always lagging behind. (ekstern lenke)
• Aarø, Leif Edvard; Ohm, Eyvind; Skogen, Jens Christoffer et al. (2023). A cross-sectional study of the relationship between injuries and quality of life, psychological distress, sleeping problems, and global subjective health in adults from three Norwegian counties. (ekstern lenke)
• Sivertsen, Børge; Knapstad, Marit; Petrie, Keith et al. (2022). Changes in mental health problems and suicidal behaviour in students and their associations with COVID-19-related restrictions in Norway: A national repeated cross-sectional analysis. (ekstern lenke)
• Sæther, Solbjørg Makalani Myrtveit; Knapstad, Marit; Grey, Nick et al. (2022). Moderators of treatment effect of Prompt Mental Health Care compared to treatment as usual: Results from a randomized controlled trial. (ekstern lenke)
• Smith, Otto Robert Frans; Sæther, Solbjørg Makalani Myrtveit; Haug, Ellen Merethe Melingen et al. (2022). Long-term outcomes at 24- and 36-month follow-up in the intervention arm of the randomized controlled trial of Prompt Mental Health Care. (ekstern lenke)
• Hansen, Thomas; Nilsen, Thomas Sevenius; Knapstad, Marit et al. (2021). Covid-fatigued? A longitudinal study of Norwegian older adults’ psychosocial well-being before and during early and later stages of the COVID-19 pandemic. (ekstern lenke)
• Lervik, Linn Vathne; Knapstad, Marit; Hoffart, Asle et al. (2021). Psychometric Properties of the Norwegian Version of the Cognitive Therapy Adherence and Competence Scale (CTACS) and Its Associations With Outcomes Following Treatment in IAPT Norway. (ekstern lenke)
• Knapstad, Marit; Smith, Robert Frans Otto (2021). Social anxiety and agoraphobia symptoms effectively treated by Prompt Mental Health Care versus TAU at 6‐ and 12‐month follow‐up: Secondary analysis from a randomized controlled trial. (ekstern lenke)
• Hansen, Thomas; Nilsen, Thomas Sevenius; Yu, Baeksan et al. (2021). Locked and lonely? A longitudinal assessment of loneliness before and during the COVID-19 pandemic in Norway. (ekstern lenke)
• Lervik, Linn Vathne; Hoffart, Asle; Knapstad, Marit et al. (2021). Exploring the temporal associations between avoidance behavior and cognitions during the course of cognitive behavioral therapy for clients with symptoms of social anxiety disorder. (ekstern lenke)
• Lervik, Linn; Knapstad, Marit; Smith, Robert Frans Otto (2020). Process evaluation of Prompt Mental Health Care (PMHC): the Norwegian version of Improving Access to Psychological Therapies. (ekstern lenke)
• Sæther, Solbjørg Makalani Myrtveit; Knapstad, Marit; Grey, Nick et al. (2020). Long-term outcomes of Prompt Mental Health Care: A randomized controlled trial. (ekstern lenke)
• Knapstad, Marit; Sæther, Solbjørg Makalani Myrtveit; Hensing, Gunnel et al. (2020). Prompt Mental Health Care (PMHC): work participation and functional status at 12 months post-treatment. (ekstern lenke)
• Myrtveit, Solbjørg Makalani; Askeland, Kristin Gärtner; Knudsen, Ann Kristin et al. (2019). Risky drinking among Norwegian students: Associations with participation in the introductory week, academic performance and alcohol-related attitudes. (ekstern lenke)
• Sæther, Solbjørg Makalani Myrtveit; Knapstad, Marit; Grey, Nick et al. (2019). Twelve months post-treatment results from the Norwegian version of improving access to psychological therapies. (ekstern lenke)
• Sivertsen, Børge; Nielsen, Morten Birkeland; Madsen, Ida E.H. et al. (2019). Sexual harassment and assault among university students in Norway. A cross-sectional prevalence study. (ekstern lenke)
• Skogen, Jens Christoffer; Knapstad, Marit; Smith, Otto Robert Frans et al. (2019). Hvordan bør rekrutteringen til folkehelseundersøkelsene gjennomføres?. (ekstern lenke)
• Thun, Eirunn; Sivertsen, Børge; Knapstad, Marit et al. (2019). Unravelling the prospective associations between mixed anxiety-depression and insomnia during the course of cognitive behavioral therapy. (ekstern lenke)
• Sæther, Solbjørg Makalani Myrtveit; Knapstad, Marit; Askeland, Kristin Gärtner et al. (2019). Alcohol consumption, life satisfaction and mental health among Norwegian college and university students. (ekstern lenke)
• Sivertsen, Børge; Hysing, Mari; Knapstad, Marit et al. (2019). Suicide attempts and non-suicidal self-harm among university students: Prevalence study. (ekstern lenke)
• Knapstad, Marit; Sivertsen, Børge; Knudsen, Ann Kristin et al. (2019). Trends in self-reported psychological distress among college and university students from 2010 to 2018. (ekstern lenke)
• Knapstad, Marit; Lervik, Linn Vathne; Sæther, Solbjørg Makalani Myrtveit et al. (2019). Effectiveness of prompt mental health care, the Norwegian version of improving access to psychological therapies: A randomized controlled trial. (ekstern lenke)
• Knapstad, Marit; Nordgreen, Tine; Smith, Otto Robert Frans (2018). Prompt mental health care, the Norwegian version of IAPT: clinical outcomes and predictors of change in a multicenter cohort study. (ekstern lenke)
• Smith, Otto Robert Frans; Alves, Daniele Evelin; Knapstad, Marit et al. (2017). Measuring mental well-being in Norway: validation of the Warwick-Edinburgh Mental Well-being Scale (WEMWBS). (ekstern lenke)
• Myrtveit, Solbjørg Makalani; Askeland, Kristin Gärtner; Knapstad, Marit et al. (2016). The Norwegian student introductory week: who takes part, and is participation associated with better social integration and satisfaction among students?. (ekstern lenke)
• Knapstad, Marit; Löve, Jesper; Holmgren, Kristina et al. (2016). Registry-based analysis of participator representativeness: a source of concern for sickness absence research?. (ekstern lenke)
• Myrtveit, Solbjørg Makalani; Askeland, Kristin Gärtner; Knudsen, Ann Kristin et al. (2016). Risky drinking among Norwegian students: associations with participation in the introductory week, academic performance and alcohol-related attitudes. (ekstern lenke)
• Hayley, Amie C.; Downey, Luke A.; Stough, Con et al. (2016). Social and emotional loneliness and self-reported difficulty initiating andmaintaining sleep (DIMS) in a sample of Norwegian university students. (ekstern lenke)
• Knapstad, Marit; Øverland, Simon Nygaard; Henderson, Max et al. (2014). Shame among long-term sickness absentees: correlates and impact on subsequent sickness absence. (ekstern lenke)
• Skogen, Jens Christoffer; Stewart, Robert; Knapstad, Marit et al. (2014). Early life factors in relation to cardiovacular disease in old age in Bergen: a Norwegian retrospective cohort study based on the Hordaland Study (HUSK). (ekstern lenke)
• Knapstad, Marit; Holmgren, Kristina; Hensing, Gunnel et al. (2014). Previous sickness absence and current low perceived social support at work among employees in the general population: A historical cohort study. (ekstern lenke)
• Skogen, Jens Christoffer; Stewart, Robert; Mykletun, Arnstein et al. (2013). An investigation of factors identified at birth in relation to anxiety and depression in old age: The Hordaland Health Study (HUSK). (ekstern lenke)
• Øverland, Simon Nygaard; Knapstad, Marit; Wilhelmsen, Ingvard et al. (2011). Do gastrointestinal complaints increase the risk for subsequent medically certified long-term sickness absence? The HUSK study. (ekstern lenke)
• Reber, Rolf; Wurtz, Pascal; Knapstad, Marit et al. (2010). Polarity correspondence in comparative number magnitude judgments. (ekstern lenke)

Rapport

• Knapstad, Marit; Hjetland, Gunnhild Johnsen; Finserås, Turi Reiten et al. (2025). Evaluering av veiledet internettbehandling ved Rask psykisk helsehjelp: En randomisert kontrollert studie. (ekstern lenke)
• Knapstad, Marit; Djupedal, Ingebjørg Louise Rockwell; Nes, Ragnhild Bang et al. (2025). Livskvalitet, subjektiv helse, sosiale relasjoner og funksjonsnivå blant eldre i Bergen 2024: En digital og postal spørreskjemaundersøkelse. (ekstern lenke)
• Vedaa, Øystein; Knapstad, Marit; Nilsen, Thomas Sevenius et al. (2025). Folkehelseundersøkelsen i Oslo 2024: Fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Knapstad, Marit; Nilsen, Thomas Sevenius; Skogen, Jens Christoffer et al. (2024). Folkehelseundersøkelsen i Agder 2023: fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Knapstad, Marit; Nes, Ragnhild Bang; Nilsen, Thomas Sevenius et al. (2024). Folkehelseundersøkelsen i Rogaland 2023: Fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Leino, Tony Mathias; Nilsen, Thomas Sevenius; Knapstad, Marit (2023). Koronaundersøkinga i Vestland 2021: Framgangsmåte og utvalde resultat. (ekstern lenke)
• Knapstad, Marit; Leino, Tony Mathias (2023). Folkehelseundersøkinga i Vestland 2022: Utvalde resultat basert på tilleggsspørsmåla i undersøkinga. (ekstern lenke)
• Leino, Tony Mathias; Nilsen, Thomas Sevenius; Aarø, Leif Edvard et al. (2023). Folkehelseundersøkelsen i Innlandet 2023: Fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Knapstad, Marit; Skogen, Jens Christoffer; Leino, Tony Mathias et al. (2022). Folkehelseundersøkelsen – Helse og trivsel i Vestfold og Telemark 2021: Fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Knapstad, Marit; Skogen, Jens Christoffer; Leino, Tony Mathias et al. (2022). Folkehelseundersøkelsen i Viken 2021: Fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Leino, Tony Mathias; Aarø, Leif Edvard; Knapstad, Marit et al. (2022). Opplevd tiltaksbyrde under koronapandemien: Resultater fra fire fylker desember 2021.. (ekstern lenke)
• Knapstad, Marit; Skogen, Jens Christoffer; Hjetland, Gunnhild Johnsen et al. (2022). Folkehelseundersøkinga i Vestland 2022: Framgangsmåte og utvalde resultat. (ekstern lenke)
• Aarø, Leif Edvard; Vedaa, Øystein; Bruun, Tone et al. (2021). Koronaatferd og landbakgrunn i fire fylker. Etterlevelse og holdninger til offisiellesmittevernråd, opplevd engstelse, psykiske plager og endringer i sosiale kontakter etter landbakgrunn. Resultater fra undersøkelser i fire fylker under koronapandemien. (ekstern lenke)
• Knapstad, Marit; Nilsen, Thomas Sevenius; Aarø, Leif Edvard et al. (2021). Folkehelseundersøkinga i Møre og Romsdal 2021: Framgangsmåte og utvalde resultat. (ekstern lenke)
• Bergsaker, Marianne A Riise; Bratsberg, Bernt; Daae, Anita Odveig et al. (2021). Folkehelserapportens temautgave 2021. Folkehelsen etter covid-19. Pandemiens konsekvenser for ulike grupper i befolkningen. (ekstern lenke)
• Skogen, Jens Christoffer; Nilsen, Thomas Sevenius; Hjetland, Gunnhild Johnsen et al. (2020). Folkehelseundersøkelsen i Rogaland 2020: Fremgangsmåte og utvalgte resultater. (ekstern lenke)
• Knapstad, Marit; Skogen, Jens Christoffer; Nilsen, Thomas Sevenius et al. (2019). Folkehelseundersøkinga i Sogn og Fjordane: Framgangsmåte og utvalde resultat. (ekstern lenke)
• Knapstad, Marit; Heradstveit, Ove; Sivertsen, Børge (2018). Studentenes helse- og trivselsundersøkelse 2018. (ekstern lenke)
• Knapstad, Marit; Heradstveit, Ove; Sivertsen, Børge (2018). Studentenes Helse- og Trivselsundersøkelse 2018 (SHoT)/ HELT ÆRLIG-undersøkelsen. (ekstern lenke)
• Ulriksen, Robin; Knapstad, Marit (2016). Digital mobbing. Kunnskapsoppsummering over forskning på effekter av tiltak.. (ekstern lenke)
• Smith, Otto Robert Frans; Alves, Daniele Evelin; Knapstad, Marit (2016). Rask psykisk helsehjelp: Evaluering av de første 12 pilotene i Norge. (ekstern lenke)
• Dalsbø, Therese Kristine; Knapstad, Marit (2015). Arbeidsplasstiltak får trolig flere sykemeldte tilbake på jobb (Cochrane - kort oppsummert). (ekstern lenke)
• Dalsbø, Therese Kristine; Knapstad, Marit (2014). Arbeidsmiljøfaktorer kan påvirke ansattes psykiske helse (omtale av SBU-rapport). (ekstern lenke)
• Dalsbø, Therese Kristine; Dahm, Kristin Thuve; Austvoll-Dahlgren, Astrid et al. (2013). Arbeidslivsbaserte tiltak for psykisk helse hos ansatte. (ekstern lenke)

Sammendrag/Abstract

• Aarø, Leif Edvard; Nilsen, Thomas Sevenius; Knapstad, Marit et al. (2024). The Norwegian Counties Public Health Survey (NCPHS). (ekstern lenke)
• Dalsbø, Therese Kristine; Knapstad, Marit (2015). Stress hos helsepersonell kan forebygges (Cochrane - kort oppsummert). (ekstern lenke)

Populærvitenskapelig artikkel

• Bjørkheim, Sebastian Brun; Sætrevik, Bjørn; Knapstad, Marit (2022). Hvilke grunner har folk til å ikke følge smitteverntiltakene?. (ekstern lenke)

Vitenskapelig oversiktsartikkel/review

• Hakvaag, Tonje Catrin; Knapstad, Marit; Bjørnestad, Jone Ravndal et al. (2022). A scooping review of Scandinavian studies of sick-listed' and social insurance officers' experiences of their encounters'. (ekstern lenke)

Vitenskapelig foredrag

• Hakvaag, Tonje Catrin; Knapstad, Marit; Bjørnestad, Jone Ravndal et al. (2021). Interpersonal encounters in Return to Work. (ekstern lenke)
• Reber, Rolf; Wurtz, Pascal; Knapstad, Marit et al. (2009). A Polarity Correspondence Account of Comparative Number Magnitude Judgments. (ekstern lenke)

Faglig foredrag

• Hakvaag, Tonje Catrin; Knapstad, Marit; Bjørnestad, Jone Ravndal et al. (2021). Factors perceived to impact return to work in Scandinavian sickness insurance: a scoping review of encounters between sick-listed and social insurance officers. (ekstern lenke)
• Smith, Otto Robert Frans; Alves, Daniele Evelin; Knapstad, Marit (2016). Status fra evalueringsarbeidet. (ekstern lenke)

Faglig kapittel

• Vedaa, Øystein; Skogen, Jens Christoffer; Knapstad, Marit et al. (2021). Psykisk helse og livskvalitet under pandemien. (ekstern lenke)

Leserinnlegg

• Smith, Otto Robert Frans; Knapstad, Marit; Alves, Daniele Evelin et al. (2017). Initial results of prompt mental health care, the Norwegian version of improving access to psychological therapies. (ekstern lenke)

Doktorgradsavhandling

• Knapstad, Marit; Øverland, Simon Nygaard (2015). Psychological factors in long-termsickness absence: the role of shame and social support: Epidemiological studies based on the Health Assets Project. (ekstern lenke)

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