Academic article

• Sommerfelt, Kristian; Schei, Trude; Seton, Katharine A. et al. (2024). Assessing Functional Capacity in Myalgic Encephalopathy/Chronic Fatigue Syndrome: A Patient-Informed Questionnaire. (external link)
• Sommerfelt, Kristian; Schei, Trude; Angelsen, Arild (2023). Severe and Very Severe Myalgic Encephalopathy/Chronic Fatigue Syndrome ME/CFS in Norway: Symptom Burden and Access to Care. (external link)
• Hoel, Fredrik; Hoel, August; Pettersen, Ina Katrine Nitschke et al. (2021). A map of metabolic phenotypes in patients with myalgic encephalomyelitis/chronic fatigue syndrome. (external link)
• Fevang, Silje Katrine Elgen; Hysing, Mari; Sommerfelt, Kristian et al. (2019). Development and predictors of childhood mental health problems in former extremely preterm infants. (external link)
• Fevang, Silje Katrine Elgen; Hysing, Mari; Sommerfelt, Kristian et al. (2017). Mental health assessed by the Strengths and Difficulties Questionnaire for children born extremely preterm without severe disabilities at 11 years of age: a Norwegian, national population-based study. (external link)
• Fluge, Øystein; Mella, Olav; Bruland, Ove et al. (2016). Metabolic profiling indicates impaired pyruvate dehydrogenase function in myalgic encephalopathy/chronic fatigue syndrome.. (external link)
• Fevang, Silje Katrine Elgen; Hysing, Mari; Markestad, Trond et al. (2016). Mental Health in Children Born Extremely Preterm Without Severe Neurodevelopmental Disabilities. (external link)
• Eger, Siw Helen; Kessler, Jørg; Kiserud, Torvid et al. (2015). Foetal Doppler abnormality is associated with increased risk of sepsis and necrotising enterocolitis in preterm infants. (external link)
• Fevang, Silje Katrine Elgen; Sommerfelt, Kristian; Leversen, Katrine Tyborg et al. (2015). Minor neurodevelopmental impairments are associated with increased occurrence of ADHD symptoms in children born extremely preterm. (external link)
• Eger, Siw Helen; Sommerfelt, Kristian; Kiserud, Torvid et al. (2013). Foetal umbilical artery Doppler in small preterms: (IQ) Neurocognitive outcome at 5 years of age. (external link)
• Leversen, Katrine Tyborg; Sommerfelt, Kristian; Elgen, Irene Bircow et al. (2012). Prediction of outcome at 5 years from assessments at 2 years among extremely preterm children: A Norwegian national cohort study. (external link)
• Leversen, Katrine Tyborg; Sommerfelt, Kristian; Rønnestad, Arild Erlend et al. (2011). Prediction of Neurodevelopmental and Sensory Outcome at 5 Years in Norwegian Children Born Extremely Preterm. (external link)
• Odberg, Morten Duus; Sommerfelt, Kristian; Markestad, Trond et al. (2010). Growth and somatic health until adulthood of low birthweight children. (external link)
• Leversen, Katrine Tyborg; Sommerfelt, Kristian; Rønnestad, Arild Erlend et al. (2010). Predicting neurosensory disabilities at two years of age in a national cohort of extremely premature infants. (external link)
• Wold, Siw-Helen Westby; Sommerfelt, Kristian; Reigstad, Hallvard et al. (2009). Neonatal mortality and morbidity in extremely preterm small for gestational age infants: a population based study. (external link)
• Høie, B; Sommerfelt, K; Waaler, PE et al. (2008). The combined burden of cognitive, executive function, and psychosocial problems in children with epilepsy: a population-based study. (external link)
• Høie, Bjørg; Mykletun, Arnstein; Waaler, Per Erik et al. (2006). Executive functions and seizure-related factors in children with epilepsy in western Norway. (external link)
• Versland, Lene Brose; Sommerfelt, Kristian; Elgen, Irene Bircow (2006). Maternal signs of chorioamnionitis: Persistent cognitive impairment in low-birthweight children. (external link)
• Høie, Bjørg; Sommerfelt, Kristian; Waaler, Per-Erik et al. (2006). Psychosocial problems and seizure-related factors in children with epilepsy. (external link)
• Kashala, Esperance; Lundervold, Astri Johansen; Sommerfelt, Kristian et al. (2006). Co-existing symptoms and risk factors among African school children with hyperactivity-inattention symptoms in Kinshasa, Congo. (external link)
• Kashala, Esperance; Elgen, Irene Bircow; Sommerfelt, Kristian et al. (2005). Teacher ratings of mental health among school children in Kinshasa, Democratic Republic of Congo. (external link)
• Elgen, Irene Bircow; Johansson, Kjell Arne; Markestad, Trond et al. (2005). A non-handicapped cohort of low-birthweight children: growth and general health status at 11 years of age. (external link)
• Høie, Bjørg; Mykletun, Arnstein; Sommerfelt, Kristian et al. (2005). Seizure-related factors and non-verbal intelligence in children with epilepsy - A population-based study from Western Norway. (external link)
• Kashala, Espérance; Elgen, Irene Bircow; Sommerfelt, Kristian et al. (2005). Cognition in African children with attention-deficit hyperactivity disorder. (external link)
• Enger, Per Ø.; Svendsen, Frode; Sommerfelt, Kristian et al. (2005). Shunt revisions in children - can they be avoided? Experiences from a population-based study. (external link)
• Kashala, Esperance; Tylleskär, Thorkild; Elgen, Irene Bircow et al. (2005). Attention deficit and hyperactivity disorder among school children in Kinshasa, Democratic Republic of Congo. (external link)
• Elgen, Irene Bircow; Lundervold, Astri Johansen; Sommerfelt, Kristian (2004). Aspects of inattention in low birth weight children. (external link)
• Waaler, Per Erik; Sommerfelt, Kristian (2004). Barnenevrologi og habilitering i Norge. (external link)
• Elgen, Irene Bircow; Ellertsen, Bjørn; Sommerfelt, Kristian (2003). Cognitive performance in a low birthweight cohort at 5 and 11 years of age. (external link)
• Sommerfelt, Kristian; Sonnander, K; Skranes, Jon et al. (2002). Neuropsychologic and motor function in small-for-gestational preschoolers. (external link)
• Sommerfelt, Kristian; Sonnander, Karin; Skranes, Jon et al. (2002). Neuropsychological and motor function in small for gestational age preschoolers. (external link)
• Aase, Lene Jeanette Grasmo; Sommerfelt, Kristian; Berstad, Tove (2002). Appendikostomi for fekalinkontinens hos barn og unge med myelomeningocele. (external link)
• Elgen, Irene Bircow; Sommerfelt, Kristian; Markestad, Trond (2002). Population based, controlled study of behavioural problems and psychiatric disorders in low birthweight children at 11 years of age. (external link)
• Elgen, Irene Bircow; Sommerfelt, Kristian (2002). Low birthweight children: coping in school?. (external link)
• Sommerfelt, Kristian; Andersson, H; Sonander, K et al. (2001). Increased risk of behavioral problems in term, small for gestational age preschoolers?. (external link)
• Andersson, HW; Sommerfelt, Kristian (2001). The relationship between cognitive abilities and maternal ratings of externalizing behaviors in preschool children. (external link)
• Sommerfelt, Kristian; Sætesdal, I; Markestad, Trond et al. (2001). Therapeutic electrical stimulation in cerebral palsy: A randomized controlled, cross-over trial. (external link)
• Sommerfelt, Kristian; Andersson, Helle Wessel; Sonnander, Karin et al. (2001). Behavior in term, small for gestational age preschoolers. (external link)
• Sommerfelt, Kristian; Markestad, Trond; Berg, Karin et al. (2001). Therapeutic electrical stimulation in cerebral palsy: a randomized, controlled, crossover trial. (external link)
• Sommerfelt, Kristian; Andersson, H.W.; Sonnander, K. et al. (2001). Behavior in term, small for gestational age preschoolers. (external link)
• Sommerfelt, Kristian; Andersson, Helle Wessel (2000). Cognitive development of term small for gestational age children at five years of age. (external link)
• Pedersen, Svein Junker; Sommerfelt, Kristian; Markestad, Trond (2000). Early motor development of premature infants with birthweight less than 2000 grams. (external link)
• Sommerfelt, Kristian; Andersson, H.W.; Sonnander, K. et al. (2000). Cognitive development of term small for gestational age children at five years of age. (external link)
• Olafsen, kÅre sten; Sommerfelt, Kristian (1999). The Yale Children's Inventory - A screening tool for attention deficits and related disorders. Normative data for boys. (external link)
• Andersson, Helle Wessel; Sommerfelt, Kristian (1998). Gender and its contribution to the prediction of cognitive abilities at 5 years. (external link)
• Sommerfelt, Kristian; Markestad, Trond; Ellertsen, Bjørn (1998). Neuropsychological performance in low birth weight preschoolers: a population-based, controlled study. (external link)
• Sommerfelt, Kristian; Markestad, Trond; Ellertsen, Bjørn (1998). Neuropsychological performance in low birth weight preschoolers: a population-based, controlled study. (external link)
• Sommerfelt, Kristian (1998). Annotation: Long term outcome for non-handicapped low birthweight infants - is the fog clearing?. (external link)
• Sommerfelt, Kristian; Ellertsen, Bjørn; Kløve, Hallgrim et al. (1997). Neuropsychological deficits in 8 year old, non-handicapped children with birth weight under 1500 g. (external link)
• Andersson, Helle Wessel; Sommerfelt, Kristian; Sonnander, Karin (1996). Maternal child rearing attitudes, IQ and socioeconomic status as related to cognitive abilities of five-year-old children. (external link)
• Sommerfelt, Kristian; Ellertsen, B; Markestad, Trond (1995). Cognitive outcome in non-handicapped low birthweight preschoolersthe role of parental factors. (external link)
• Sommerfelt, Kristian; Ellertsen, B; Markestad, Trond (1995). Parental factors in cognitive outcome of non-handicapped low birthweight infants. (external link)
• Ellertsen, B.; Sommerfelt, Kristian; Flornes, T. et al. (1991). Neuropsychological and Neuropediatric evalualtion of 8-year old children with birth weight lower than 1500 grams. (external link)
• Haugen, Olav; Seland, JH; Sommerfelt, Kristian et al. (1991). Diagnostikk av Spielmeyer-Vogts sykdom. Elektronmikroskopi av konjunktivalbiopsi. (external link)

Reader opinion piece

• Tronstad, Karl Johan; Fluge, Øystein; Lien, Katarina et al. (2017). Mer om pyruvat dehydrogenase og kronisk utmattelsessyndrom.. (external link)

Doctoral dissertation

• Eger, Siw Helen; Sommerfelt, Kristian (2016). Significance of intrauterine growth, and abnormal fetal blood flow for neonatal and long term outcome in preterm infants. (external link)
• Fevang, Silje Katrine Elgen; Sommerfelt, Kristian; Hysing, Mari (2016). Mental health among children born extremely preterm or with extremely low birth weight at preschool- and school age. A national population based study. (external link)
• Sommerfelt, Kristian (1997). Preschool neurodevelopment in non-handicapped children with birthweight less than 2000 g. (external link)

Chapter

• Stovner, Lars Jacob; Sommerfelt, Kristian; Russell, Michael Bjørn (2014). Hodepine. (external link)

Academic chapter/article/Conference paper

• Stovner, Lars Jacob; Sommerfelt, Kristian (2010). Hodepine. (external link)
• Markestad, Trond; Sommerfelt, Kristian (2009). Nervesystemet og musklene. (external link)
• Markestad, Trond; Sommerfelt, Kristian (2009). Psykomotorisk utvikling. (external link)
• Sommerfelt, Kristian (2002). Utvikling. (external link)
• Sommerfelt, Kristian (2002). Vekst og utvikling. (external link)
• Sommerfelt, Kristian; Markestad, Trond; Ellertsen, Bjørn (1994). Nevromotorisk og adferdsmessig utvikling hos 8 år gamle barn med fødselsvekt under 1500g. (external link)

Academic lecture

• Wold, H; Sommerfelt, Kristian; Kiserud, Torvid et al. (2003). Fostersirkulasjon og hjernevekst hos premature. (external link)
• Sommerfelt, Kristian (2002). Utvikling hos barn - vær romslig i din vurdering. (external link)
• Sommerfelt, Kristian (2002). Intrauterin veksthemming- langtidsutsikter- en populasjonsbasert, kontrollert oppfølgingsstudie. (external link)
• Sommerfelt, Kristian (2002). Problemer med læring og adferd. (external link)
• Bindoff, LA; Mjellem, N; Sommerfelt, Kristian (2001). Fascioscapulohumeral muscular dystrophy and Coat's disease in a Norwegian Familly. (external link)
• Sommerfelt, Kristian (2001). Barnenevrologi. (external link)
• Sommerfelt, Kristian (2001). Cerebral sirkulasjon, blødning og iskemi. (external link)
• Sommerfelt, Kristian (2001). Prematur for resten av livet. (external link)
• Sommerfelt, Kristian (2001). Betydning av lav fødselsvekt for barns senere utvikling. Resultater fra Bergensstudien. Regionsenteret for Barne- og Ungdomspsykiatri, Helseregion Vest. (external link)
• Sommerfelt, Kristian; Anderson, H; Sonander, K et al. (1995). Intrauterine growth retardation and subsequent long-term neurodevelopment - a population based, controlled follow-up study. (external link)
• Sommerfelt, Kristian; Ellertsen, B; Markestad, Trond (1995). Neuropsychological outcome in children with Low Birth Weight (LBW, < 2kg). (external link)
• Troland, K; Sommerfelt, Kristian; Ellertsen, B (1995). Personality and behavior in ADHD children and low birthweight weight (LBW) children. (external link)
• Markestad, Trond; Sommerfelt, Kristian; Ellertsen, B (1995). Outcome at 5 years in low birthweight non-handicapped children. (external link)
• Troland, K; Sommerfelt, Kristian; Ellertsen, B (1995). Personality and behavior in ADHD children and low birthweight (LBW) children. (external link)
• Sommerfelt, Kristian; Ellertsen, B; Markestad, Trond (1995). Neuropsychological outcome in children with low birth weight (LBW < 2kg). (external link)

Editorial

• Sommerfelt, Kristian (2001). Cerebral parese-forekomst og tolkning. (external link)

Lecture

• Sommerfelt, Kristian (1998). Overlevelse og risiko for nevrologiske funksjonshemninger ved for tidlig fødsel [invitert foredrag]. (external link)

See a complete overview of publications in Cristin.