Academic article

• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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?. (external link)
• 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. (external link)
• 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. (external link)
• Aarø, Leif Edvard; Knapstad, Marit; Nilsen, Thomas Sevenius et al. (2024). The Norwegian Counties Public Health Survey (NCPHS): a design study. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• Sæther, Solbjørg Makalani Myrtveit; Knapstad, Marit; Grey, Nick et al. (2020). Long-term outcomes of Prompt Mental Health Care: A randomized controlled trial. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• Skogen, Jens Christoffer; Knapstad, Marit; Smith, Otto Robert Frans et al. (2019). Hvordan bør rekrutteringen til folkehelseundersøkelsene gjennomføres?. (external link)
• 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. (external link)
• 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. (external link)
• Sivertsen, Børge; Hysing, Mari; Knapstad, Marit et al. (2019). Suicide attempts and non-suicidal self-harm among university students: Prevalence study. (external link)
• 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. (external link)
• 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. (external link)
• 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. (external link)
• 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). (external link)
• 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?. (external link)
• Knapstad, Marit; Löve, Jesper; Holmgren, Kristina et al. (2016). Registry-based analysis of participator representativeness: a source of concern for sickness absence research?. (external link)
• 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. (external link)
• 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. (external link)
• Knapstad, Marit; Øverland, Simon Nygaard; Henderson, Max et al. (2014). Shame among long-term sickness absentees: correlates and impact on subsequent sickness absence. (external link)
• 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). (external link)
• 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. (external link)
• 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). (external link)
• 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. (external link)
• Reber, Rolf; Wurtz, Pascal; Knapstad, Marit et al. (2010). Polarity correspondence in comparative number magnitude judgments. (external link)

Report

• Knapstad, Marit; Hjetland, Gunnhild Johnsen; Finserås, Turi Reiten et al. (2025). Evaluering av veiledet internettbehandling ved Rask psykisk helsehjelp: En randomisert kontrollert studie. (external link)
• 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. (external link)
• Vedaa, Øystein; Knapstad, Marit; Nilsen, Thomas Sevenius et al. (2025). Folkehelseundersøkelsen i Oslo 2024: Fremgangsmåte og utvalgte resultater. (external link)
• Knapstad, Marit; Nilsen, Thomas Sevenius; Skogen, Jens Christoffer et al. (2024). Folkehelseundersøkelsen i Agder 2023: fremgangsmåte og utvalgte resultater. (external link)
• Knapstad, Marit; Nes, Ragnhild Bang; Nilsen, Thomas Sevenius et al. (2024). Folkehelseundersøkelsen i Rogaland 2023: Fremgangsmåte og utvalgte resultater. (external link)
• Leino, Tony Mathias; Nilsen, Thomas Sevenius; Knapstad, Marit (2023). Koronaundersøkinga i Vestland 2021: Framgangsmåte og utvalde resultat. (external link)
• Knapstad, Marit; Leino, Tony Mathias (2023). Folkehelseundersøkinga i Vestland 2022: Utvalde resultat basert på tilleggsspørsmåla i undersøkinga. (external link)
• Leino, Tony Mathias; Nilsen, Thomas Sevenius; Aarø, Leif Edvard et al. (2023). Folkehelseundersøkelsen i Innlandet 2023: Fremgangsmåte og utvalgte resultater. (external link)
• Knapstad, Marit; Skogen, Jens Christoffer; Leino, Tony Mathias et al. (2022). Folkehelseundersøkelsen – Helse og trivsel i Vestfold og Telemark 2021: Fremgangsmåte og utvalgte resultater. (external link)
• Knapstad, Marit; Skogen, Jens Christoffer; Leino, Tony Mathias et al. (2022). Folkehelseundersøkelsen i Viken 2021: Fremgangsmåte og utvalgte resultater. (external link)
• Leino, Tony Mathias; Aarø, Leif Edvard; Knapstad, Marit et al. (2022). Opplevd tiltaksbyrde under koronapandemien: Resultater fra fire fylker desember 2021.. (external link)
• Knapstad, Marit; Skogen, Jens Christoffer; Hjetland, Gunnhild Johnsen et al. (2022). Folkehelseundersøkinga i Vestland 2022: Framgangsmåte og utvalde resultat. (external link)
• 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. (external link)
• Knapstad, Marit; Nilsen, Thomas Sevenius; Aarø, Leif Edvard et al. (2021). Folkehelseundersøkinga i Møre og Romsdal 2021: Framgangsmåte og utvalde resultat. (external link)
• 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. (external link)
• Skogen, Jens Christoffer; Nilsen, Thomas Sevenius; Hjetland, Gunnhild Johnsen et al. (2020). Folkehelseundersøkelsen i Rogaland 2020: Fremgangsmåte og utvalgte resultater. (external link)
• Knapstad, Marit; Skogen, Jens Christoffer; Nilsen, Thomas Sevenius et al. (2019). Folkehelseundersøkinga i Sogn og Fjordane: Framgangsmåte og utvalde resultat. (external link)
• Knapstad, Marit; Heradstveit, Ove; Sivertsen, Børge (2018). Studentenes helse- og trivselsundersøkelse 2018. (external link)
• Knapstad, Marit; Heradstveit, Ove; Sivertsen, Børge (2018). Studentenes Helse- og Trivselsundersøkelse 2018 (SHoT)/ HELT ÆRLIG-undersøkelsen. (external link)
• Ulriksen, Robin; Knapstad, Marit (2016). Digital mobbing. Kunnskapsoppsummering over forskning på effekter av tiltak.. (external link)
• Smith, Otto Robert Frans; Alves, Daniele Evelin; Knapstad, Marit (2016). Rask psykisk helsehjelp: Evaluering av de første 12 pilotene i Norge. (external link)
• Dalsbø, Therese Kristine; Knapstad, Marit (2015). Arbeidsplasstiltak får trolig flere sykemeldte tilbake på jobb (Cochrane - kort oppsummert). (external link)
• Dalsbø, Therese Kristine; Knapstad, Marit (2014). Arbeidsmiljøfaktorer kan påvirke ansattes psykiske helse (omtale av SBU-rapport). (external link)
• Dalsbø, Therese Kristine; Dahm, Kristin Thuve; Austvoll-Dahlgren, Astrid et al. (2013). Arbeidslivsbaserte tiltak for psykisk helse hos ansatte. (external link)

Abstract

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

Popular scientific article

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

Academic literature 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'. (external link)

Academic lecture

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

Lecture

• 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. (external link)
• Smith, Otto Robert Frans; Alves, Daniele Evelin; Knapstad, Marit (2016). Status fra evalueringsarbeidet. (external link)

Chapter

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

Reader opinion piece

• 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. (external link)

Doctoral dissertation

• 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. (external link)

See a complete overview of publications in Cristin.