Odd Martin Vallersnes

• Christensen, Veronika S; Skow, Marius Andre Hybbestad; Flottorp, Signe Agnes; Strømme, Hilde; Mdala, Ibrahimu & Vallersnes, Odd Martin (2024). Immediate or delayed trial without catheter in acute urinary retention in males: A systematic review. BJUI Compass. ISSN 2688-4526. doi: 10.1002/bco2.369.
• Vallersnes, Odd Martin; Dines, Alison M.; Wood, David M.; Heyerdahl, Fridtjof; Hovda, Knut Erik & Yates, Christopher [Vis alle 20 forfattere av denne artikkelen] (2023). Self-discharge during treatment for acute recreational drug toxicity: an observational study from emergency departments in seven European countries. International Journal of Emergency Medicine. ISSN 1865-1372. 16(1). doi: 10.1186/s12245-023-00566-1. Fulltekst i vitenarkiv
• Noseda, Roberta; Franchi, Matteo; Pagnamenta, Alberto; Müller, Laura; Dines, Alison M. & Giraudon, Isabelle [Vis alle 16 forfattere av denne artikkelen] (2023). Determinants of Admission to Critical Care Following Acute Recreational Drug Toxicity: A Euro-DEN Plus Study. Journal of Clinical Medicine. ISSN 2077-0383. 12(18). doi: 10.3390/jcm12185970. Fulltekst i vitenarkiv
• Prescott, Marcus Glenton; Iakovleva, Ekaterina; Simpson, Melanie Rae; Pedersen, Sindre Andre; Munblit, Daniel & Vallersnes, Odd Martin [Vis alle 7 forfattere av denne artikkelen] (2023). Intranasal analgesia for acute moderate to severe pain in children – a systematic review and meta-analysis. BMC Pediatrics. ISSN 1471-2431. 23(1). doi: 10.1186/s12887-023-04203-x. Fulltekst i vitenarkiv
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil; Ruud, Sven Eirik & Dahl, Cecilie (2023). Use of emergency primary care among pregnant undocumented migrants over ten years: an observational study from Oslo, Norway. Scandinavian Journal of Primary Health Care. ISSN 0281-3432. 41(3), s. 317–325. doi: 10.1080/02813432.2023.2237074. Fulltekst i vitenarkiv
• Skjælaaen, Katarina; Nesvold, Helle; Brekke, Mette; Sare, Miriam; Landaas, Elisabeth Toverud & Mdala, Ibrahimu [Vis alle 8 forfattere av denne artikkelen] (2022). Sexually transmitted infections among patients attending a sexual assault centre: a cohort study from Oslo, Norway. BMJ Open. ISSN 2044-6055. 12:e064934(12), s. 1–9. doi: 10.1136/bmjopen-2022-064934. Fulltekst i vitenarkiv
• Miró, Òscar; Burillo-Putze, Guillermo; Schmid, Yasmin; Salgado, Emilio; Liechti, Matthias E & Dines, Alison M. [Vis alle 14 forfattere av denne artikkelen] (2022). Severity of emergency department presentations due to acute drug toxicity in Europe: a longitudinal analysis over a 6-year period (2014–2019) stratified by sex. European journal of emergency medicine. ISSN 0969-9546. doi: 10.1097/MEJ.0000000000000978.
• Crulli, Benjamin; Dines, Alison M.; Blanco, Georgina; Giraudon, Isabelle; Eyer, Florian & Liechti, Matthias E [Vis alle 13 forfattere av denne artikkelen] (2022). Novel psychoactive substances-related presentations to the emergency departments of the European drug emergencies network plus (Euro-DEN plus) over the six-year period 2014–2019. Clinical Toxicology. ISSN 1556-3650. doi: 10.1080/15563650.2022.2137524. Fulltekst i vitenarkiv
• Simmenroth, Anne; Harding, Alex; Vallersnes, Odd Martin; Dowek, Aimee; Carelli, Francesco & Kiknadze, Nino [Vis alle 7 forfattere av denne artikkelen] (2022). Early clinical exposure in undergraduate medical education: A questionnaire survey of 30 European countries. Medical Teacher. ISSN 0142-159X. doi: 10.1080/0142159X.2022.2137014. Fulltekst i vitenarkiv
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil; Storkås, Guro & Ekrem, Marthe [Vis alle 11 forfattere av denne artikkelen] (2022). Use of non-governmental maternity services and pregnancy outcomes among undocumented women: a cohort study from Norway. BMC Pregnancy and Childbirth. ISSN 1471-2393. 22, s. 1–13. doi: 10.1186/s12884-022-05112-0. Fulltekst i vitenarkiv
• Johannessen, Tonje Rambøll; Halvorsen, Sigrun; Atar, Dan; Munkhaugen, John; Nore, Anne Kathrine & Wisløff, Torbjørn [Vis alle 7 forfattere av denne artikkelen] (2022). Cost-effectiveness of a rule-out algorithm of acute myocardial infarction in low-risk patients: emergency primary care versus hospital setting. BMC Health Services Research. ISSN 1472-6963. 22(1). doi: 10.1186/s12913-022-08697-6. Fulltekst i vitenarkiv Vis sammendrag

  Aims: Hospital admissions of patients with chest pain considered as low risk for acute coronary syndrome contribute to increased costs and crowding in the emergency departments. This study aims to estimate the cost-effectiveness of assessing these patients in a primary care emergency setting, using the European Society of Cardiology (ESC) 0/1-h algorithm for high-sensitivity cardiac troponin T, compared to routine hospital management. Methods: A cost-effectiveness analysis was conducted. For the primary care estimates, costs and health care expenditure from the observational OUT-ACS (One-hoUr Troponin in a low-prevalence population of Acute Coronary Syndrome) study were compared with anonymous extracted administrative data on low-risk patients at a large general hospital in Norway. Patients discharged home after the hs-cTnT assessment were defined as low risk in the primary care cohort. In the hospital setting, the low-risk group comprised patients discharged with a non-specific chest pain diagnosis (ICD-10 codes R07.4 and Z03.5). Loss of health related to a potential increase in acute myocardial infarctions the following 30-days was estimated. The primary outcome measure was the costs per quality-adjusted life year (QALY) of applying the ESC 0/1-h algorithm in primary care. The secondary outcomes were health care costs and length of stay in the two settings. Results: Differences in costs comprise personnel and laboratory costs of applying the algorithm at primary care level (€192) and expenses related to ambulance transports and complete hospital costs for low-risk patients admitted to hospital (€1986). Additional diagnostic procedures were performed in 31.9% (181/567) of the low-risk hospital cohort. The estimated reduction in health care cost when using the 0/1-h algorithm outside of hospital was €1794 per low-risk patient, with a mean decrease in length of stay of 18.9 h. These numbers result in an average per-person QALY gain of 0.0005. Increased QALY and decreased costs indicate that the primary care approach is clearly cost-effective. Conclusion: Using the ESC 0/1-h algorithm in low-risk patients in emergency primary care appears to be cost-effective compared to standard hospital management, with an extensive reduction in costs and length of stay per patient.

• Ingebrigtsen, Erlend; Persett, Per Sverre; Brekke, Mette; Heyerdahl, Fridtjof; Hovda, Knut Erik & Vallersnes, Odd Martin (2022). Poisoning with central stimulant drugs: an observational study from Oslo, Norway. International Journal of Emergency Medicine. ISSN 1865-1372. 15(1). doi: 10.1186/s12245-022-00457-x. Fulltekst i vitenarkiv
• Johannessen, Tonje Rambøll; Halvorsen, Sigrun; Atar, Dan & Vallersnes, Odd Martin (2022). Performance of the Novel Observation Group Criteria of the European Society of Cardiology (ESC) 0/1-Hour Algorithm in a Low-Risk Population. Journal of the American Heart Association (JAHA). ISSN 2047-9980. 11(7). doi: 10.1161/JAHA.121.024927. Fulltekst i vitenarkiv
• Heier, Eva-Carina; Eyer, Florian; Rabe, Christian; Geith, Stefanie; Dargan, Paul I & Wood, David M. [Vis alle 15 forfattere av denne artikkelen] (2022). Clinical effect of ethanol co-use in patients with acute drug toxicity involving the use of central nervous system depressant recreational drugs. European journal of emergency medicine. ISSN 0969-9546. 29(4), s. 291–300. doi: 10.1097/MEJ.0000000000000932.
• Iqbal, Zahra Zeineb; Nguyen, Thanh Mai Thi; Brekke, Mette & Vallersnes, Odd Martin (2022). Unspecified opioids among opioid overdoses in Oslo, Norway. BMC Research Notes. ISSN 1756-0500. 15. doi: 10.1186/s13104-022-06022-2. Fulltekst i vitenarkiv Vis sammendrag

  Objective Since 2017, an increasing number of opioid overdoses in Oslo, Norway, has been categorized as involving unspecified opioids, as noted in the patient records by the doctor treating the patient. In this study we compare the characteristics of overdoses involving unspecified opioids, long-acting opioids, and heroin. Data on patients presenting with opioid overdose was retrospectively collected from 1 October 2013 to 31 December 2019 at the Oslo Accident and Emergency Outpatient Clinic. Results Among 2381 included cases, 459 (19.3%) involved unspecified opioids, 134 (5.6%) long-acting opioids, and 1788 (75.1%) heroin. Overdoses involving unspecified opioids needed longer observation, median 5 h 29 min vs. 4 h 54 min (long-acting opioids) and 4 h 49 min (heroin) (p < 0.001), and had a lower Glasgow coma scale score, median 10 vs. 13 in both the other groups (p < 0.001). Naloxone was given in 23.3% of cases involving unspecified opioids, vs. 12.7% involving long-acting opioids and 30.2% involving heroin (p < 0.001). A larger proportion of patients were transferred to hospital care when unspecified or long-acting opioids were involved compared to heroin, 16.3% and 18.7% respectively vs. 10.1% (p < 0.001). Our results indicate that the category “unspecified opioids” encompasses a substantial proportion of opioids acting longer than heroin.

• Vibeto, Jon Hjellum; Vallersnes, Odd Martin; Dobloug, Andrea; Brekke, Mette; Jacobsen, Dag & Ekeberg, Øivind [Vis alle 7 forfattere av denne artikkelen] (2021). Treating patients with opioid overdose at a primary care emergency outpatient clinic: a cost-minimization analysis. Cost Effectiveness and Resource Allocation. ISSN 1478-7547. 19(1), s. 1–12. doi: 10.1186/s12962-021-00303-6. Fulltekst i vitenarkiv
• Noseda, Roberta; Schmid, Yasmin; Scholz, Irene; Liakoni, Evangelia; Liechti, Matthias E. & Dargan, Paul I. [Vis alle 36 forfattere av denne artikkelen] (2021). MDMA-related presentations to the emergency departments of the European Drug Emergencies Network plus (Euro-DEN Plus) over the four-year period 2014-2017. Clinical Toxicology. ISSN 1556-3650. 59(2), s. 131–137. doi: 10.1080/15563650.2020.1784914.
• Klem, Nicolai; Skjerven, Håvard Ove; Nilsen, Beate; Brekke, Mette & Vallersnes, Odd Martin (2021). Treatment for acute bronchiolitis before and after implementation of new national guidelines: A retrospective observational study from primary and secondary care in Oslo, Norway. BMJ Paediatrics Open. ISSN 2399-9772. 5(1), s. 1–6. doi: 10.1136/bmjpo-2021-001111. Fulltekst i vitenarkiv
• Tran, Jenny Victoria; Brekke, Mette & Vallersnes, Odd Martin (2021). Rusrelaterte forgiftninger ved Legevakten i Oslo i 2014–18. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 141, s. 646–651. doi: 10.4045/tidsskr.20.0751.
• Miro, Oscar; Waring, W. Stephen; Dargan, Paul I.; Wood, David M.; Dines, Alison M. & Yates, Christopher [Vis alle 25 forfattere av denne artikkelen] (2021). Variation of drugs involved in acute drug toxicity presentations based on age and sex: an epidemiological approach based on European emergency departments. Clinical Toxicology. ISSN 1556-3650. doi: 10.1080/15563650.2021.1884693.
• Johannessen, Tonje R.; Atar, Dan; Vallersnes, Odd Martin; Larstorp, Anne Cecilie Kjeldsen; Mdala, Ibrahimu & Halvorsen, Sigrun (2021). Comparison of a single high-sensitivity cardiac troponin T measurement with the HEART score for rapid rule-out of acute myocardial infarction in a primary care emergency setting: a cohort study. BMJ Open. ISSN 2044-6055. 11(2). doi: 10.1136/bmjopen-2020-046024. Fulltekst i vitenarkiv
• Johannessen, Tonje R.; Vallersnes, Odd Martin; Halvorsen, Sigrun; Larstorp, Anne Cecilie Kjeldsen; Mdala, Ibrahimu & Atar, Dan (2020). Pre-hospital One-Hour Troponin in a Low-Prevalence Population of Acute Coronary Syndrome: OUT-ACS study. Open heart. ISSN 2053-3624. 7:e001296, s. 1–9. doi: 10.1136/openhrt-2020-001296. Fulltekst i vitenarkiv
• Andersson, Jon Andreas; Brekke, Mette & Vallersnes, Odd Martin (2020). Akutt forgiftning ved rusrelatert bruk av benzodiazepiner. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 140, s. 1027–1030. doi: 10.4045/tidsskr.20.0035. Fulltekst i vitenarkiv Vis sammendrag

  BACKGROUND Benzodiazepines are also used as intoxicants. This can be dangerous, particularly in multisubstance abuse. We describe cases of acute poisoning related to substance abuse of benzodiazepines in patients at the main A&E clinic in Oslo. MATERIAL AND METHOD We included all patients treated for substance abuse poisoning with benzodiazepines and/or z-hypnotics at the Oslo Accident and Emergency Outpatient Clinic from 1 October 2013 to 30 September 2015. The patients were found through a retrospective review of the A&E clinic’s registers. Data were taken from patient records. Diagnosis of the toxic agent was based on the attending doctor’s recorded clinical evaluation. Acute poisoning from substance abuse of benzodiazepines | Tidsskrift for Den norske legeforening RESULTS Of 1 037 cases, 787 (76 %) were men. The median age was 36 (interquartile range 28–46, range 14–78). Clonazepam (Rivotril) was the most frequently occurring drug, with 575 cases (55 %), followed by diazepam (Stesolid, Valium, Vival) 158 (15 %), alprazolam (Xanor) 125 (12 %) and oxazepam (Sobril) 94 (9 %). Zopiclone (Imovane, Zopitin) and zolpidem (Stilnoct) occurred rarely, in 25 (2 %) and 11 (1 %) cases, respectively. Benzodiazepines were combined with other intoxicants in 936 (90 %) cases, most frequently heroin 484 (47 %), ethanol 321 (31 %) and amphetamine 199 (19 %). INTERPRETATION In substance abuse poisoning, benzodiazepines were very often combined with other intoxicants, most frequently opioids, ethanol and/or amphetamine.

• Aronsen, Aron; Brekke, Mette & Vallersnes, Odd Martin (2020). Akutt forgiftning med gammahydroksybutyrat. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 140, s. 1023–1026. doi: 10.4045/tidsskr.19.0780. Vis sammendrag

  BACKGROUND Many patients with gamma-hydroxybutyrate (GHB) poisoning are treated at the emergency primary health care (A&E clinic) level in Oslo. We describe the clinical picture of GHB poisoning and compare hospitalised patients with patients who were discharged from the main A&E clinic in Oslo. MATERIAL AND METHOD We registered retrospectively all patients with the clinical diagnosis GHB poisoning at the Oslo Accident and Emergency Outpatient Clinic from 1 October 2013 to 30 September 2015. We only included cases where GHB was taken as an intoxicant. Acute poisoning with gamma-hydroxybutyrate | Tidsskrift for Den norske legeforening RESULTS We found 329 cases of GHB poisoning in the period. The median age was 30 years (interquartile range 25–36 years, range 15–56 years), and 228 (69 %) of the cases were men. GHB was taken as the only intoxicant in 128 cases (39 %), combined with alcohol in 96 (29 %) and with amphetamine in 65 (20 %). Reduced level of consciousness was observed in 218 cases (69 %), coma (Glasgow Coma Scale score ≤ 7) in 43 (14 %) and agitation in 117 (36 %). Compared with patients who were discharged from the A&E clinic, the 159 hospitalised patients (48 % of the total number) were more often comatose (23 % vs 5 %, p < 0.001) and agitated (43 % vs 28 %, p = 0.008). The median observation time at the A&E clinic prior to hospitalisation was 42 minutes (interquartile range 26 min – 1 h 23 min, range 2 min – 20 h 10 min) vs 3 h 1 min (interquartile range 1 h 32 min – 4 h 42 min, range 14 min – 15 h 37 min) for those who were discharged from the A&E clinic (p < 0.001). INTERPRETATION Half of the patients with GHB poisoning were only treated at A&E clinic level. Many of those who were hospitalised had severe symptoms that quickly called for hospitalisation.

Se alle arbeider i Cristin

• Vallersnes, Odd Martin (2024). Rusmiddelforgiftninger på legevakt.
• Austad, Bjarne; Prescott, Marcus Glenton; Iakovleva, Ekaterina; Simpson, Melanie Rae; Pedersen, Sindre Andre & Munblit, Daniel [Vis alle 7 forfattere av denne artikkelen] (2023). Intranasal analgesia for acute moderate to severe pain in children - a systematic review and meta-analysis.
• Vallersnes, Odd Martin (2023). Ruspåvirkning – hva er farlig?
• Christensen, Veronika S; Skow, Marius; Flottorp, Signe Agnes; Strømme, Hilde; Mdala, Ibrahimu & Vallersnes, Odd Martin (2023). Immediate or delayed trial without catheter when treating acute urinary retention in males: a systematic review .
• Vallersnes, Odd Martin (2023). Akutte forgiftninger.
• Vallersnes, Odd Martin (2023). Gir vi for mye nalokson?
• Vallersnes, Odd Martin (2023). Psychosis associated with recreational drug use.
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil Krarup; Valberg, Morten & Dahl, Cecilie (2023). Perinatal mortality among pregnant undocumented migrants in Norway 1999-2020: a register-based population study.
• Vallersnes, Odd Martin (2023). Rusmiddelforgiftning – hva er farlig?
• Harding, Alex; Simmenroth, Anne; Zarbailov, Natalia; Vallersnes, Odd Martin; Varvuolyte, Sonata & Jicol, Anisia [Vis alle 14 forfattere av denne artikkelen] (2023). Snapshot of the provision and resources of undergraduate GP education: research informing practice.
• Simmenroth, Anne; Karppinen, Helena; Vallersnes, Odd Martin; Zarbailov, Natalia; Harding, Alex & Varvuolyte, Sonata [Vis alle 12 forfattere av denne artikkelen] (2023). Surveying undergraduate education across Europe: a long way from the idea to data collection.
• Karppinen, Helena; Zarbailov, Natalia; Simmenroth, Anne; Harding, Alex; Carelli, Francesco & Kiknadze, Nino [Vis alle 7 forfattere av denne artikkelen] (2023). Patient contacts from the 1st year in medical school: a choice for future!
• Vallersnes, Odd Martin (2023). Rusmidler på legevakt: hva er farlig og hva gjør vi?
• Vallersnes, Odd Martin (2023). Rusmiddelforgiftning på legevakt.
• Vallersnes, Odd Martin (2023). Rusmiddelforgiftninger på legevakt.
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil; Ruud, Sven Eirik & Dahl, Cecilie (2023). Use of emergency health care services by pregnant undocumented migrants over a ten-year period in Oslo, Norway.
• Christensen, Veronika S; Skow, Marius; Flottorp, Signe Agnes; Strømme, Hilde; Mdala, Ibrahimu & Vallersnes, Odd Martin (2023). Trial without catheter immediately or after some days when treating acute urinary retention in males: a systematic review.
• Aasgaard, Viktoria T.; Abrahamsen, Maria; Brekke, Mette & Vallersnes, Odd Martin (2023). Factors associated with hospitalization for acute recreational drug toxicity.
• Skjelland, Didrik; Jørgenrud, Benedicte Marie; Gundersen, Karsten; Bjørnaas, Mari Asphjell; Brekke, Mette & Dalaker, Vivian Moe [Vis alle 8 forfattere av denne artikkelen] (2023). Gamma-hydroxybutyrate (GHB) intoxication: clinical diagnosis versus laboratory findings.
• Wood, David M.; Dines, Alison M.; Liechti, Matthias E.; Giraudon, Isabelle; Heyerdahl, Fridtjof & hovda, knut erik [Vis alle 10 forfattere av denne artikkelen] (2023). Diphenidine, methoxyphenidine and related 1,2-diarylethylamine acute toxicity reported to the Euro-DEN Plus project.
• Vallersnes, Odd Martin (2023). Legevakt som arbeidsmåte.
• Vallersnes, Odd Martin (2023). Akutte forgiftninger.
• Vallersnes, Odd Martin (2023). Rusmiddelpåvirkning: hva er farlig?
• Vallersnes, Odd Martin (2023). Kliniske beslutninger når det haster.
• Vallersnes, Odd Martin (2023). Rusmiddelforgiftninger.
• Vallersnes, Odd Martin (2023). Etter overdosen. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 143.
• Harding, Alex; Vallersnes, Odd Martin; Carelli, Francesco; Kiknadze, Nino; Karppinen, Helena & Simmenroth, Anne (2023). European standards for undergraduate medical education in general practice; a blueprint - for action. Education for Primary Care. ISSN 1473-9879. doi: 10.1080/14739879.2022.2155997.
• Vallersnes, Odd Martin (2023). Rusmiddelforgiftninger på legevakt.
• Iqbal, Zahra Zeineb; Nguyen, Thanh Mai Thi; Brekke, Mette & Vallersnes, Odd Martin (2022). Unspecified opioids among opioid overdoses in Oslo, Norway.
• Klem, Nicolai; Skjerven, Håvard Ove; Brekke, Mette & Vallersnes, Odd Martin (2022). Treatment of acute bronchiolitis before and after implementation of new national guidelines: a retrospective observational study from primary and secondary care in Norway. .
• Vallersnes, Odd Martin (2022). Hvordan møte mennesker med ruslidelser.
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil; Ruud, Sven Eirik & Dahl, Cecilie (2022). Use of an emergency primary clinic in Oslo by pregnant undocumented migrants compared to pregnant residents of Norway.
• Vallersnes, Odd Martin (2022). Akutt forgiftning med dempende rusmidler.
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil; Ruud, Sven Eirik & Dahl, Cecilie (2022). Utilization of an emergency primary care clinic in Oslo by pregnant undocumented migrants compared to pregnant residents of Norway.
• Klem, Nicolai; Skjerven, Håvard Ove; Nilsen, Beate; Brekke, Mette & Vallersnes, Odd Martin (2022). Treatment for acute bronchiolitis before and after implementation of new national guidelines: a retrospective observational study from primary and secondary care in Oslo, Norway.
• Vallersnes, Odd Martin (2022). Rusmiddelforgiftning - hva er farlig?
• Waters, Mitchell; Wood, David M.; Yates, Christopher; Dines, Alison M.; Giraudon, Isabelle & Liechti, Matthias E. [Vis alle 11 forfattere av denne artikkelen] (2022). Clinical effects of cannabis compared to synthetic cannabinoids (SCs): a retrospective cohort study.
• Vallersnes, Odd Martin (2022). Rusmiddelforgiftning – hva er farlig?
• Vallersnes, Odd Martin (2022). Rusmiddelforgiftninger på legevakt.
• Eick, Frode; Vallersnes, Odd Martin; Fjeld, Heidi; Sørbye, Ingvil; Storkås, Guro & Ekrem, Marthe [Vis alle 11 forfattere av denne artikkelen] (2022). Use of non-governmental maternity services and pregnancy outcomes among undocumented women: a cohort study from Norway. Vis sammendrag

  In 2011, Norway granted pregnant undocumented women the right to antenatal care and to give birth at a hospital, but did not include them in the general practitioner and reimbursement schemes. In addition, Non-Governmental Organizations (NGO) have been running health clinics for undocumented migrants. There is a need to investigate how pregnant undocumented women use NGO clinics and how this affects their maternal health. We therefore investigated the care received, occurrence of pregnancy-related complications and maternal and perinatal outcomes in women receiving care at these clinics. In this historic cohort study we included pregnant women aged 18-49 who attended urban NGO clinics between 2009-2020 and retrieved their medical records from the hospitals in the uptake area. We compared women based on region of origin using log-binominal regression to estimate relative risk of adverse outcomes. We identified 582 pregnancies in 500 women during the study period. About half (46.5%) the women sought antenatal care after the first trimester. The women had median 1 (IQR 1-3) antenatal visit at the NGO clinics which referred 77.7% of the women to public health care. In 205 retrieved deliveries, there was a 45.9% risk for any adverse outcome. The overall risk of stillbirth was 1.0%, pre-term birth 10.3%, and emergency caesarean section 19.3%. Pregnant undocumented women who use NGO clinics receive substandard antenatal care and have a high risk of adverse maternal and perinatal outcomes. This study suggests that increased attention should be given to ensure the accessibility of adequate antenatal care to undocumented women.

• Eick, Frode; Vallersnes, Odd Martin; Sørbye, Ingvil; Ebbing, Cathrine; Storkås, Guro & Ekrem, Marthe [Vis alle 11 forfattere av denne artikkelen] (2022). Pregnant undocumented women’s use of two humanitarian clinics between 2009-2020 and their maternal outcomes in Norway: A cohort study.
• Christensen, Veronika S; Vallersnes, Odd Martin; Skow, Marius; Strømme, Hilde & Flottorp, Signe Agnes (2022). Trial without catheter immediately or after some days when treating acute urinary retention in males: a systematic review.
• Vallersnes, Odd Martin (2022). Akutt forgiftning.
• Vallersnes, Odd Martin (2022). Erfaringer fra arbeidet med forgiftningstilstander med sentralstimulerende rusmidler og GHB ved Legevakten i Oslo.
• Vallersnes, Odd Martin (2022). Rusmiddelforgiftninger på legevakt.
• Johannessen, Tonje Rambøll; Halvorsen, Sigrun; Atar, Dan; Munkhaugen, John; Nore, Anne Kathrine & Wisløff, Torbjørn [Vis alle 7 forfattere av denne artikkelen] (2021). Cost-minimization analysis of acute myocardial infarction rule-out in low-risk patients: emergency primary care versus hospital.
• Johannessen, Tonje Rambøll; Halvorsen, Sigrun; Atar, Dan; Munkhaugen, John; Nore, Anne Kathrine & Wisløff, Torbjørn [Vis alle 7 forfattere av denne artikkelen] (2021). Cost-minimisation analysis of acute myocardial infarction rule-out in low-risk patients: primary care emergency setting versus hospital setting.
• Vallersnes, Odd Martin (2021). Partydop.
• Vallersnes, Odd Martin (2021). Rusmiddelforgiftninger på legevakt.
• Vallersnes, Odd Martin (2021). Akutt forgiftning.
• Vallersnes, Odd Martin (2021). Akutt forgiftning med dempende rusmidler.
• Møllerløkken, Marianne L; Brekke, Mette & Vallersnes, Odd Martin (2021). Psychosis associated with acute recreational drug toxicity.
• Nørstebø, Jørgen F; Brekke, Mette & Vallersnes, Odd Martin (2021). Acute poisonings involving cannabis in Oslo, Norway.
• Stenbeck, Ingrid M; Brekke, Mette & Vallersnes, Odd Martin (2021). Acute recreational drug toxicity among young patients.
• Slørdahl, Johannes Thomassen; Persett, Per Sverre; Brekke, Mette; Heyerdahl, Fridtjof; Hovda, Knut Erik & Vallersnes, Odd Martin (2021). Acute poisoning from concurrent use of opioids and amphetamine.
• Ingebrigtsen, Erlend; Brekke, Mette & Vallersnes, Odd Martin (2021). Poisoning by central stimulant drugs in Oslo, Norway.
• Vallersnes, Odd Martin (2021). Akutt forgiftning.
• Vallersnes, Odd Martin (2021). Akutt rusmiddelforgiftning: vurdering og behandling.
• Vallersnes, Odd Martin (2021). Akutt rusmiddelforgiftning: vurdering og behandling.
• Vallersnes, Odd Martin (2021). Akutt rusmiddelforgiftning: vurdering og behandling.
• Vallersnes, Odd Martin (2021). Legevakt som arbeidsmåte.
• Vallersnes, Odd Martin (2021). Rusmiddelforgiftninger på legevakt.
• Karppinen, Helena; Simmenroth, Anne; Carelli, Francesco; Cojic, Milena; Kiknadze, Nino & Madjova, Valentina [Vis alle 10 forfattere av denne artikkelen] (2020). Alignment of Undergraduate General Practice/Family Medicine Education in Europe: Standards for High Quality Education. I Baum, Erika; Ungan, Mehmet & Steylaerts, Carl (Red.), The World Book of Family Medicine - WONCA Europe Edition 2020. Wonca Europe. ISSN 978-961-07-0307-5. s. 18–20.
• Johannessen, Tonje R.; Atar, Dan; Vallersnes, Odd Martin; Larstorp, Anne Cecilie Kjeldsen; Mdala, Ibrahimu & Halvorsen, Sigrun (2020). A single high-sensitivity cardiac troponin T compared to the HEART score for a rapid rule-out of acute myocardial infarction at a prehospital emergency clinic . European Heart Journal. ISSN 0195-668X. 41. doi: 10.1093/ehjci/ehaa946.1680.
• Vallersnes, Odd Martin (2020). Akutt forgiftning.
• Vallersnes, Odd Martin (2020). Rusmiddelforgiftninger på legevakt.
• Vallersnes, Odd Martin (2020). Legevakt som arbeidsmåte.
• Johannessen, Tonje R.; Atar, Dan; Vallersnes, Odd Martin; Larstorp, Anne Cecilie Kjeldsen; Mdala, Ibrahimu & Halvorsen, Sigrun (2020). A single high-sensitivity cardiac troponin T compared to the HEART score for a rapid rule-out of acute myocardial infarction at a prehospital emergency clinic .
• Vallersnes, Odd Martin (2020). Unge og rus: erfaringer fra Legevakten i Oslo.
• Vallersnes, Odd Martin; Dines, Alison M.; Wood, David M.; Heyerdahl, Fridtjof; Hovda, Knut Erik & Yates, Christopher [Vis alle 8 forfattere av denne artikkelen] (2020). Self-discharge during treatment for acute recreational drug toxicity: an analysis of four-years of Euro-DEN Plus presentations.
• Vibeto, Jon Hjellum; Vallersnes, Odd Martin; Dobloug, Andrea; Brekke, Mette; Jacobsen, Dag & Ekeberg, Øivind [Vis alle 7 forfattere av denne artikkelen] (2020). Treating patients with opioid overdose at a primary care emergency outpatient clinic: a cost-minimization analysis.
• Dalaker, Vivian; Furuhaugen, Håvard; Brekke, Mette; Bjørnaas, Mari Asphjell & Vallersnes, Odd Martin (2020). Analysis of drugs in blood and urine samples from suspected spiked drink victims.
• Andersson, Jon Andreas; Brekke, Mette & Vallersnes, Odd Martin (2020). Acute poisoning related to the recreational use of benzodiazepines.
• Aronsen, Aron C; Brekke, Mette & Vallersnes, Odd Martin (2020). Gamma-hydroxybutyrate (GHB) poisoning in a primary care emergency setting.
• Johannessen, Tonje R.; Vallersnes, Odd Martin; Larstorp, Anne Cecilie Kjeldsen; Mdala, Ibrahimu; Atar, Dan & Halvorsen, Sigrun (2020). Fast prehospital rule-out using a high-sensitivity cardiac Troponin T assay in a low-prevalence population for Acute Coronary Syndrome (The OUT-ACS study).
• Vallersnes, Odd Martin (2020). Den kvasse samtalen. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 140(4). doi: 10.4045/tidsskr.20.0076.

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