Academic article

• Ingvard Wilhelmsen (1995). Magesår (Sammendrag av doktordisputas). (external link)
• Ingvard Wilhelmsen (1995). Duodenal ulcer: Psychological and bacteriological factors. Doctoral dissertation. Self report. (external link)
• Ingvard Wilhelmsen (1992). Behandling av magesår med vismutsubnitrat, oksytetracyklin og metronidazol. (external link)
• Ingvard Wilhelmsen (1995). Quality of life in upper gastrointestinal disorders. (external link)
• Trygve Hausken; S. Svebak; Ingvard Wilhelmsen et al. (1991). Stress-related antral motility in healthy persons and in non-ulcer dyspepsia patients: The signinficance of symphatetic and vagal tone. (external link)
• Tone Tangen Haug; Ingvard Wilhelmsen (1992). Prosjektet "Kognitiv terapi ved ulcus duodeni og nonulcer dyspepsi". (external link)
• Ingvard Wilhelmsen (1992). Ny behandling av magesår. (external link)
• Ingvard Wilhelmsen; Ø. Hundal; R. Berstad et al. (1992). Behandling av magesår med vismutbinitrat, oxytetracyclin og metronidaol. (external link)
• R. Weberg; C. Bank; K. Berstad et al. (1992). Treatment of Helicobacer pylori in Peptic Ulcer Disease. (external link)
• Ingvard Wilhelmsen; R. Weberg; K. Berstad et al. (1992). Ny behandling av magesår. (external link)
• Tone Tangen Haug; S. Svebak; Trygve Hausken et al. (1992). Personality factors as predictors of stress-related antral motility, vagal activation and symptoms in functional lyspepsia patients. (external link)
• Ingvard Wilhelmsen; A. Berstad (1992). Duodenial ulcer recurrence after cognitive therapy and after Helicobacter pylori eradication. (external link)
• Ingvard Wilhelmsen; J. G. Høyersten (1992). Legetyper - finnes de?. (external link)
• Ingvard Wilhelmsen; Tone Tangen Haug; P. Sipponen et al. (1994). Helicobacter pylori in functional dyspepsia and normal controls. (external link)
• Ingvard Wilhelmsen; August Bakke; Tone Tangen Haug et al. (1994). Psychosocial adjustment to illness scale (PAIS-SR) in a Norwegian material of patients with functional dyspepsia, duodenal ulcer, and urinary bladder dysfunction. (external link)
• Solbjørg Makalani Myrtveit; Jens Christoffer Skogen; Keith James Petrie et al. (2013). Factors related to non-recovery from whiplash. The Nord-Trøndelag Health Study (HUNT). (external link)
• Ingvard Wilhelmsen (2000). Brain-gut axis as an example of the bio-psycho-social model. (external link)
• Ingvard Wilhelmsen (2000). The role of psychosocial factors in gastrointestinal disorders. (external link)
• Kari-Elise Frøystad Veddegjærde; Børge Sivertsen; Jens Christoffer Skogen et al. (2020). Long-term effect of cognitive–behavioural therapy in patients with Hypochondriacal Disorder. (external link)
• A. Berstad; Trygve Hausken; Odd Helge Gilja et al. (1996). Review: Gastric accommodation in functional dyspepsia. (external link)
• A. Berstad; S. Olafsson; S. Tefera et al. (1996). Bismuth therapy for Helicobacter pylori infection. A review of five years' experience at a university hospital in Norway. (external link)
• Arnold Berstad; Ketil Berstad; Ingvard Wilhelmsen et al. (1995). Spiramycin in triple therapy of Helicobacter pylori-associated peptic ulcer disease. An open pilot study with 12-month follow-up. (external link)
• Kari-Elise Veddegjærde; Børge Sivertsen; Ingvard Wilhelmsen et al. (2014). Confirmatory factor analysis and item response theory analysis of the Whiteley Index. Results from a large population based study in Norway. The Hordaland Health Study (HUSK). (external link)
• Birgitte Boye; Turid Birgitte Boye; Knut Lundin et al. (2008). The INSPIRE study: Do personality traits predict general quality of life (Short form-36) in distressed patients with ulcerative colitis and Crohn's disease?. (external link)
• Ingvard Wilhelmsen; Tone Tangen Haug; Holger Ursin et al. (1994). Effect of short-term cognitive psychoterapy on recurrence of duodenal ulcer: A Prospective randomized trial. (external link)
• Ingvard Wilhelmsen; Tone Tangen Haug; Holger Ursin et al. (1994). Effect of short-term cognitive psychoterapy on recurrence of duodenal ulcer: A Prospective randomized trial. (external link)
• Ingvard Wilhelmsen (2005). Biological sensitisation and psychological amplification: Gateways to subjective health complaints and somatoform disorders. (external link)
• T.T. Haug; S. Svebak; Ingvard Wilhelmsen et al. (1994). Psychological factors and somatic symptoms in functional dyspepsia: A comparison with duodenal ulcer and healthy controls. (external link)
• Solbjørg Makalani Myrtveit; Ingvard Wilhelmsen; Keith James Petrie et al. (2013). What characterizes individuals developing chronic whiplash?: The Nord-Trondelag Health Study (HUNT). (external link)
• T.T. Haug; S. Svebak; Trygve Hausken et al. (1994). Low vagal activity as mediating mechanism for the relationship between personality factors and gastric symptoms in functional dyspepsia. (external link)
• T.T. Haug; S. Svebak; Ingvard Wilhelmsen et al. (1994). Psychological factors and somatic symptoms in functional dyspepsia: A comparison with duodenal ulcer and healthy controls. (external link)
• A. Berstad; K. Berstad; Jan Gunnar Hatlebakk et al. (1994). Ti dagers trippelkur for Helicobacter pylori-infeksjon og magesår: Status fire uker og ett år etter. (external link)
• Ingvard Wilhelmsen; Ragnar Weberg; Ketil Berstad et al. (1994). Helicobacter pylori eradication with bismuth substrate, oxytetracycline and metronidagol in patients with peptic ulcer disease. (external link)
• Ingvard Wilhelmsen; A. Berstad (1994). Quality of life and relapse of duodenal ulcer before and after eradication of Helicobacter pylori. (external link)
• Ingvard Wilhelmsen (1994). Psykiatriforskningen som ble til bakteriologi. Intervju med Mette Bugge. (external link)
• Ingvard Wilhelmsen (1994). Psykologiske faktorer ved magesår. (external link)
• Ingvard Wilhelmsen; Jan Gunnar Hatlebakk; Snorri Olafsson et al. (1999). On demand therapy of reflux oesophagitis - a prospective study of symptoms, patient satisfaction and quality of life. (external link)
• Ingvard Wilhelmsen; Ragnar Weberg; Ketil Berstad et al. (1994). Helicobacter pylori eradication with bismuth substrate, oxytetracycline and metronidagol in patients with peptic ulcer disease. (external link)
• T.T. Haug; S. Svebak; Trygve Hausken et al. (1994). Low vagal activity as mediating mechanism for the relationship between personality factors and gastric symptoms in functional dyspepsia. (external link)
• Tone Tangen Haug; S. Svebak; Ingvard Wilhelmsen et al. (1994). Psychotherapy in functional dyspepsia. (external link)
• Ingvard Wilhelmsen; Tone Tangen Haug; P. Sipponen et al. (1994). Helicobacter pylori in functional dyspepsia and normal controls. (external link)
• Ingvard Wilhelmsen (1994). Studie av pasienter med ulcus duodeni og funksjonell dyspepsi. (external link)
• P. M. Isaksen; K. J. Bovim; Tone Tangen Haug et al. (1994). En båtulykke og organiseringen av det psykososiale støtteapparat. (external link)
• A. Berstad; K. Berstad; Jan Gunnar Hatlebakk et al. (1994). Ti dagers trippelkur for Helicobacter pylori-infeksjon og magesår: Status fire uker og ett år etter. (external link)
• Ingvard Wilhelmsen; A. Berstad (1994). Quality of life and relapse of duodenal ulcer before and after eradication of Helicobacter pylori. (external link)
• Ingvard Wilhelmsen; Tone Tangen Haug; Holger Ursin et al. (1994). Effect of short-term cognitive psychoterapy on recurrence of duodenal ulcer: A Prospective randomized trial. (external link)
• Birgitte Boye; Turid Birgitte Boye; Jørgen Jahnsen et al. (2008). The INSPIRE study: Are different personality traits related to disease-specific quality of life (OBDQ) in distressed patients with ulcerative colitis and Crohn's disease?. (external link)
• Tone Tangen Haug; S. Svebak; Trygve Hausken et al. (1992). Personality factors as predictors of stress-related antral motility, vagal activation and symptoms in fuctinal dyspepsia patients (abstract). (external link)
• Ingvard Wilhelmsen; Arnold Berstad (2004). Reduced Relapse Rate in Duodenal Ulcer Disease Leads to Normalization of Psychological Distress: Twelve-year Follow-up. (external link)
• Odd Helge Gilja; Trygve Hausken; Ingvard Wilhelmsen et al. (1996). Impaired accomodation of the proximal stomach to a meal in functional dyspepsia. (external link)
• Per Olav Vandvik; Ingvard Wilhelmsen; Camilla Ihlebæk et al. (2004). Comorbidity of irritable bowel syndrome in general practice: a striking feature with clinical implications. (external link)
• K. Berstad; Ingvard Wilhelmsen; A. Berstad (1992). Biometric Evaluation of Gastric Urease Activity in Man. (external link)
• Marianne Klokk; Stephen A. Stansfeld; Simon Nygaard Øverland et al. (2011). Somatization: the under-recognized factor in non-specific eczema. The Hordaland Health Study (HUSK). (external link)
• Ingvard Wilhelmsen; Sobbie Mulindi; David Sankok et al. (2007). Subjective health complaints are more prevalent in Maasais than in Norwegians. (external link)
• Trygve Hausken; S. Svebak; Ingvard Wilhelmsen et al. (1993). Low vagal tone and antral dysmotility in patients with functional dyspepsia. (external link)
• Ingvard Wilhelmsen (2002). Somatization, sensitization, and functional dyspepsia. (external link)
• Ann Elisabeth Ellingsen; Ingvard Wilhelmsen (2002). Sykdomsangst blant medisin- og jusstudenter. (external link)
• Espen Thiis-Evensen; Ingvard Wilhelmsen; Geir S Hoff et al. (1999). The Psychologic Effect of Attending a Screening Program for Colorectal Polyps. (external link)
• Ingvard Wilhelmsen; G Jantschek (2007). Psychotherapie bei Hypochondrie - Sinnsuche in der kognitiven Verhaltenstherapie. (external link)
• Ingvard Wilhelmsen (2002). Hypokondri og kognitiv terapi. (external link)
• T.T. Haug; S. Svebak; Ingvard Wilhelmsen et al. (1994). Psychological factors and somatic symptoms in functional dyspepsia: A comparison with duodenal ulcer and healthy controls. (external link)
• Ingvard Wilhelmsen (1996). Quality of Life and Helicobacter pylori Eradication. (external link)
• Ann Kristin Knudsen; Line Iden Berge; Jens Christoffer Skogen et al. (2015). The prospective association between health anxiety and cancer detection: A cohort study linking the Hordaland Health Study (HUSK) with the Norwegian Cancer Registry. (external link)
• T.T. Haug; Ingvard Wilhelmsen; S. Svebak et al. (1994). Psychotherapy in functional dyspepsia. (external link)
• Ingvard Wilhelmsen (2000). Brain-gut axis as an example of the bio-psycho-social model. (external link)
• Ingvard Wilhelmsen (2000). The role of psychosocial factors in gastrointestinal disorders. (external link)
• Arnold Berstad; JG Hatlebakk; Ingvard Wilhelmsen et al. (1995). Follow-up on 242 patients with peptic ulcer disease one year after eradication of Helicobacter pylori infection. (external link)
• Ingvard Wilhelmsen; TT Haug; Holger Ursin et al. (1995). Discriminant analysis of factors distinguishing patients with functional dyspepsia from patients with duodenal ulcer. (external link)
• Ingvard Wilhelmsen; T.T. Haug; Holger Ursin et al. (1995). Discriminant analysis of factors distinguishing patients with functional dyspepsia from patients with duodenal ulcer: Significance of somatization. (external link)
• T.T Haug; Ingvard Wilhelmsen; Holger Ursin et al. (1995). Life-events and stress in patients with functional dyspepsia compared with duodenal ulcer and healthy controls. (external link)
• TT Haug; Ingvard Wilhelmsen; Holger Ursin et al. (1995). What are the real problems for patients with functional dyspepsia. (external link)
• TT Haug; Ingvard Wilhelmsen; Arnold Berstad et al. (1995). Life-events and stress in patients with functional dyspepsia compared to patients with duodenal ulcer and healthy controls. (external link)
• T.T Haug; Ingvard Wilhelmsen; Holger Ursin et al. (1995). What are the real problems for patients with functinal dyspepsia?. (external link)
• Mette Helvik Morken; Ragna Lind; Jørgen Valeur et al. (2009). Subjective health complaints and quality of life in patients with irritable bowel syndrome following Giardia lamblia infection: A case control study. (external link)
• T.T Haug; S. Svebak; Trygve Hausken et al. (1994). Low vagal activity as mediating mechanisms for the relationship between personality factors and gastric symptoms in functional dyspepsia. (external link)
• T.T Haug; S. Svebak; Trygve Hausken et al. (1994). Comments to "Inferring vagal tone from heart rate variability" (editorial comment: Jennings, J.R., McKnight, J.D. Psychosom. Med. 1994; 56: 187-93). (external link)
• Turid Birgitte Boye; Knut E A Lundin; Günter Jantschek et al. (2011). INSPIRE Study: Does stress management improve the course of inflammatory bowel disease and disease-specific quality of life indDistressed patients with ulcerative colitis or Crohn's Disease? A randomized controlled trial. (external link)
• Ingvard Wilhelmsen; Jørn Bødtker (1996). Kognitiv terapi ved subjektive somatiske symptomer. (external link)
• R. Berstad; Ingvard Wilhelmsen; A. Berstad (1992). Biometric evaluation of gastric urease activity in man. (external link)
• Arnstein Mykletun; Ove Heradstveit; Kari Eriksen et al. (2009). Health anxiety and disability pension award: The HUSK Study. (external link)
• Odd Helge Gilja; Trygve Hausken; Ingvard Wilhelmsen et al. (1997). Dèfaut d'adaptation de l'estomac proximal au repas, dans la dyspepsie fonctionelle. (external link)
• Simon Nygaard Øverland; Marit Knapstad; Ingvard Wilhelmsen et al. (2011). Do gastrointestinal complaints increase the risk for subsequent medically certified long-term sickness absence? The HUSK study. (external link)
• Trygve Hausken; S. Svebak; Ingvard Wilhelmsen et al. (1993). Low vagal tone and antral dysmotility in patients with functional dyspepsia. (external link)
• Solbjørg Makalani Myrtveit; Anja Maria Steinsland Ariansen; Ingvard Wilhelmsen et al. (2013). A population based validation study of self-reported pensions and benefits: the Nord-Trøndelag health study (HUNT). (external link)
• Arnold Berstad; Trygve Hausken; Odd Helge Gilja et al. (1997). Gastric accommodation in functional dyspepsia. [Review]. (external link)
• Ingvard Wilhelmsen (2001). Kognitiv terapi ved somatoforme lidelser. (external link)
• Line Iden Berge; Jens Christoffer Skogen; Gerhard Sulo et al. (2016). Health anxiety and risk of ischaemic heart disease: A prospective cohort study linking the Hordaland Health Study (HUSK) with the Cardiovascular Diseases in Norway (CVDNOR) project. (external link)
• Kari-Elise Frøystad Veddegjærde; Jens Christoffer Skogen; Ingvard Wilhelmsen et al. (2025). Mental and somatic health burdens of hypochondriacal disorder in higher education: national study among Norwegian students. (external link)
• Kjersti Balle Tharaldsen; Lars Edvin Bru; Ingvard Wilhelmsen (2011). Mindful coping and metal health among adolescents. (external link)

Non-fiction monograph

• Ingvard Wilhelmsen (2000). Livet er et usikkert prosjekt. (external link)
• Ingvard Wilhelmsen (1997). Hypokondri og kognitiv terapi. (external link)
• Ingvard Wilhelmsen; Agneta Hörnsten Svanberg; Ewa Westmann (1996). Hypokondri i gr@ænslandet medicin/psykiatri. (external link)
• Ingvard Wilhelmsen (2000). Livet er et usikkert prosjekt. (external link)

Conference lecture

• Ingvard Wilhelmsen (2000). Functional dyspepsia: Psychological factors. (external link)
• Odd Helge Gilja; Ingvard Wilhelmsen; Svein Ødegaard (1997). Presentation on Internet of a method to study gastric accommodation. (external link)
• Odd Helge Gilja; Ingvard Wilhelmsen; Svein Ødegaard (1997). Gastric motility on the world wide web. (external link)
• Ingvard Wilhelmsen (1996). Funksjonelle gastrointestinale tilstander: En oversikt. (external link)
• Odd Helge Gilja; Ingvard Wilhelmsen; Svein Ødegaard (1997). Presentation of a novel ultrasonographic method on the world wide web. (external link)
• Ingvard Wilhelmsen (2000). Functional dyspepsia: Psychological factors. (external link)
• Ingvard Wilhelmsen; Arnold Berstad (1995). Quality of life, dyspeptic symptoms and relapse of duodenal ulcer before and after eradication of Helicobacter pylori. (external link)
• Ingvard Wilhelmsen; Tone Tangen-Haug; Arnold Berstad et al. (1996). Effect of short-term cognitive-behaviourial therapy on subjective somatic symptoms in functional dyspepsia: A randomized controlled trial. (external link)
• Ingvard Wilhelmsen; Jan Gunnar Hatlebakk; Snorri Olafsson et al. (1998). On demand therapy of reflux oesophagitis: a study of symptoms, patient satisfaction and quality of life. (external link)
• Ingvard Wilhelmsen (1997). Treatment of hypochondria with cognitive behavior therapy. (external link)
• A. Berstad; R. Weberg; Ingvard Wilhelmsen et al. (1994). Follow-up on 227 Patients with Peptic Ulcer Disease One Year after Eradication of Helicobacter Pylori. (external link)
• Ingvard Wilhelmsen (1992). Problemer tilknyttet behandling av Helicobacter pylori. Bivirkninger/compliance. Referat fra symposium under Nordiske Gastroenterologimøte i Bergen 5/6-92: Magesårsbehandlingen ved et veiskille?. (external link)

Doctoral thesis (PhD)

• Ingvard Wilhelmsen (1995). Duodenal ulcer : psychological and bacteriological factors. (external link)

Academic book chapter

• Ingvard Wilhelmsen (1999). Metoder for måling av livskvalitet. (external link)
• Ingvard Wilhelmsen (1995). Magesår. (external link)
• Ingvard Wilhelmsen (2012). Hypochondriasis or health anxiety. (external link)
• Ingvard Wilhelmsen (2007). Hypokondri. (external link)

Journal review

• Ingvard Wilhelmsen (2009). Kort og godt om sosial angst. (external link)
• Jørgen Valeur; Trygve Hausken; Jan Gunnar Hatlebakk et al. (2021). Minneord: Arnold Berstad (1940-2020). (external link)
• Ingvard Wilhelmsen (2012). Nøktern om sjalusi. Bokanmeldelse av "Sjalusi. Kjærlighetens skyggesider" av Arne Repål. (external link)
• Ingvard Wilhelmsen (2006). Fatigue as a window to the brain. (external link)
• Ingvard Wilhelmsen (2007). Utfyllende om psykosomatisk medisin. (external link)
• Ingvard Wilhelmsen (2002). Omfattende om hypokondri. Starcevic V, Lipcitt DR: Hypochondriasis. Modern perspectives on an ancient malady. Oxford 2001. (external link)
• Ingvard Wilhelmsen (2011). "Plastikkirurger, hudleger og psykiatere: Les dette!" Bokanmeldelse av "Body dysmorphic disorder. A treatment manual" av D. Veale og F. Neziroglu. (external link)
• Ingvard Wilhelmsen (2011). "Viktig om metakognitiv terapi". Bokanmeldelse av "Metakognitiv terapi. En innføring" av P. Fisher og A. Wells. (external link)

Media feature article

• Ingvard Wilhelmsen (1996). "Infections in the gastrointestinal tract." (Bokanmeldelse.). (external link)

Non-fiction book chapter

• Ingvard Wilhelmsen (2015). Sjef i eget liv. (external link)

Popular science book

• Ingvard Wilhelmsen (2006). Kongen anbefaler - holdninger for folket. (external link)
• Ingvard Wilhelmsen (2013). "I Don't Eat Blacks! Herdsboy and Educator. The Life of Richard O. Ondeng". (external link)
• Ingvard Wilhelmsen (2004). Sjef i eget liv - en bok om kognitiv terapi. (external link)
• Ingvard Wilhelmsen (2011). "Det er ikke mer synd på deg enn andre. En bok om ansvar og frigjøring". (external link)
• Ingvard Wilhelmsen (2008). Kapittel om "Hypokondri" i "Håndbok i kognitiv terapi" Torkil Berge/Arne Repå (red.). (external link)

Professional article

• Ingvard Wilhelmsen (2024). Hypokondri, fra magen til hodet. (external link)

Conference abstract

• B. Boye; KEA Lundin; S Leganger et al. (2007). Personality traits in inflammatory bowel disease. A cross-sectional study of distressed patients with ulcerative colitis and Crohn's disease. The INSPIRE study. (external link)
• B. Boye; J. Jahnsen; S Leganger et al. (2007). Different personality factors are related to disease specific quality of life (IBDQ) in distressed patients with ulcerative colitis and Crohn's disease. The INSPIRE study. (external link)
• Knut Erik Aslaksen Lundin; Jørgen Jahnsen; Siv Leganger et al. (2008). The INSPIRE study: Does stress management intervention improve course of IBD and disease specific quality of life in distressed patients with Ulcerative colitis and Crohn's disease?. (external link)

Academic literature review

• Ingvard Wilhelmsen (2007). Livet er som en fotballkamp. (external link)

Popular science article

• Ingvard Wilhelmsen (2009). Det tenkte er ofte det verste. (external link)
• Ingvard Wilhelmsen; Odd Helge Gilja (1997). Forskningsformidling via world wide web. (external link)
• Odd Helge Gilja; Ingvard Wilhelmsen (1997). World wide web som medium til å presentere ny vitenskapelig metode. (external link)

Lecture

• Ingvard Wilhelmsen; Kjersti Balle Tharaldsen (2009). Livet er et usikkert prosjekt. Hvordan kan vi best mulig mestre alt stresset, omstillingene og usikkerheten?. (external link)

Research report

• Ingvard Wilhelmsen; Jan Helge Solhaug; Jon Florholmen et al. (1998). "Introduksjon av ny teknologi og nye metoder" i "Etiske utfordringer /dilemma innen gastroenterologien". (external link)

See a complete overview of publications in NVA.