Academic article

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

Letter to the editor

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

Conference lecture

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

Conference abstract

• KT Leversen; K Sommerfelt; Lorentz M Irgens et al. (2009). Relationship between cognitive and motor function at 5 years of age in a national cohort of extremely preterm infants. (external link)
• KT Leversen; K Sommerfelt; Lorentz M Irgens et al. (2009). Cognitive outcome at 5 years of age in a national cohort of extremely pre-term infants. (external link)
• E Kashala; Irene Bircow Elgen; Kristian Sommerfelt et al. (2004). Neuropsychiatric symptoms among African school children in Kinshasa. (external link)
• Morten Duus Odberg; Kristian Sommerfelt; Trond Markestad et al. (2009). GROWTH AND SOMATIC HEALTH UNTIL ADULTHOOD OF LOW BIRTH WEIGHT CHILDREN. (external link)

Doctoral thesis (PhD)

• Kristian Sommerfelt (1997). Preschool neurodevelopment in non-handicapped children with birthweight less than 2000 g. (external link)
• Siw Helen Eger; Kristian Sommerfelt (2016). Significance of intrauterine growth, and abnormal fetal blood flow for neonatal and long term outcome in preterm infants. (external link)
• Silje Katrine Elgen Fevang; Kristian Sommerfelt; Mari Hysing (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)

Academic book chapter

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

Editorial/Leader article

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

Non-fiction book chapter

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

Lecture

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

See a complete overview of publications in NVA.