Ola Olen

Ola Olen

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Ola Olen

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Inflammatory Bowel Disease and Parkinson's Disease: A Reply to Letter to the Editor of Shih-Wei Lai.

Inflamm Bowel Dis 2019 Aug 13. Epub 2019 Aug 13.

Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1093/ibd/izz181DOI Listing
August 2019

Gastrointestinal Infection Increases Odds of Inflammatory Bowel Disease in a Nationwide Case-Control Study.

Clin Gastroenterol Hepatol 2019 Jun 30;17(7):1311-1322.e7. Epub 2018 Oct 30.

Division of Digestive and Liver Disease, Department of Medicine, Columbia University Medical Center, New York, New York; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Sweden; Department of Pediatrics, Orebro University Hospital, Orebro, Sweden; Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Nottingham, United Kingdom.

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https://linkinghub.elsevier.com/retrieve/pii/S15423565183102
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http://dx.doi.org/10.1016/j.cgh.2018.09.034DOI Listing
June 2019

Work Loss Before and After Diagnosis of Crohn's Disease.

Inflamm Bowel Dis 2019 Jun;25(7):1237-1247

Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1093/ibd/izy382DOI Listing
June 2019

No association between urbanisation, neighbourhood deprivation and IBD: a population-based study of 4 million individuals.

Gut 2019 05 24;68(5):947-948. Epub 2018 Apr 24.

Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1136/gutjnl-2018-316326DOI Listing
May 2019

Mortality in adult-onset and elderly-onset IBD: a nationwide register-based cohort study 1964-2014.

Gut 2019 May 15. Epub 2019 May 15.

Department of Pediatrics, Örebro University Hospital, Örebro, Sweden.

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http://dx.doi.org/10.1136/gutjnl-2018-317572DOI Listing
May 2019

The longitudinal integrated database for health insurance and labour market studies (LISA) and its use in medical research.

Eur J Epidemiol 2019 Apr 30;34(4):423-437. Epub 2019 Mar 30.

Clinical Epidemiology Unit, Department of Medicine Stockholm, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1007/s10654-019-00511-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451717PMC
April 2019

Clinical presentation of intussusception in Swedish children under 3 years of age and the validity of diagnostic coding.

Pediatr Surg Int 2019 Mar 26;35(3):373-381. Epub 2018 Nov 26.

Department of Communicable Disease Control and Prevention, Stockholm County Council, Stockholm, Sweden.

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http://dx.doi.org/10.1007/s00383-018-4421-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6394471PMC
March 2019

Association between use of azathioprine and risk of acute pancreatitis in children with inflammatory bowel disease: a Swedish-Danish nationwide cohort study.

Lancet Child Adolesc Health 2019 Mar 24;3(3):158-165. Epub 2019 Jan 24.

Clinical Epidemiology Division, Department of Medicine, Karolinska Institutet, Stockholm, Sweden; Department of Epidemiology Research, Statens Serum Institute, Copenhagen, Denmark.

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http://dx.doi.org/10.1016/S2352-4642(18)30401-2DOI Listing
March 2019

Reply about alarm symptoms in functional gastrointestinal disorders.

Acta Paediatr 2019 Feb 4;108(2):378. Epub 2018 Oct 4.

Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.

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http://doi.wiley.com/10.1111/apa.14573
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http://dx.doi.org/10.1111/apa.14573DOI Listing
February 2019

Increased Mortality of Patients With Childhood-Onset Inflammatory Bowel Diseases, Compared With the General Population.

Gastroenterology 2019 02 17;156(3):614-622. Epub 2018 Oct 17.

Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Sweden; Department of Pediatrics, Orebro University Hospital, Orebro, Sweden; Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Nottingham, UK; Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York.

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https://linkinghub.elsevier.com/retrieve/pii/S00165085183515
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http://dx.doi.org/10.1053/j.gastro.2018.10.028DOI Listing
February 2019

Fracture Risk in Patients With Inflammatory Bowel Disease: A Nationwide Population-Based Cohort Study From 1964 to 2014.

Am J Gastroenterol 2019 Feb;114(2):291-304

Patient Area Gastroenterology, Dermatovenerology and Rheumatology, Inflammation and Infection Theme Karolinska University Hospital, Stockholm, Sweden.

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http://dx.doi.org/10.14309/ajg.0000000000000062DOI Listing
February 2019

No Association Between Consumption of Sweetened Beverages and Risk of Later-Onset Crohn's Disease or Ulcerative Colitis.

Clin Gastroenterol Hepatol 2019 Jan 8;17(1):123-129. Epub 2018 May 8.

Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.

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http://dx.doi.org/10.1016/j.cgh.2018.04.059DOI Listing
January 2019

Inflammatory Bowel Disease and Parkinson's Disease: A Nationwide Swedish Cohort Study.

Inflamm Bowel Dis 2019 01;25(1):111-123

Clinical Epidemiology Unit, Department of Medicine Solna, Stockholm, Sweden.

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http://dx.doi.org/10.1093/ibd/izy190DOI Listing
January 2019

Association between inflammatory bowel disease and Parkinson's disease: seek and you shall find?

Gut 2019 01 18;68(1):175-176. Epub 2018 Jul 18.

Department of Gastroenterology, North Zealand University Hospital, Frederikssund, Denmark.

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http://dx.doi.org/10.1136/gutjnl-2018-316937DOI Listing
January 2019

Changes in inflammatory bowel disease subtype during follow-up and over time in 44,302 patients.

Scand J Gastroenterol 2019 Jan 31;54(1):55-63. Epub 2019 Jan 31.

a Department of Clinical Science and Education , Södersjukhuset, Karolinska Institutet , Stockholm , Sweden.

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https://www.tandfonline.com/doi/full/10.1080/00365521.2018.1
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http://dx.doi.org/10.1080/00365521.2018.1564361DOI Listing
January 2019

Identification of Menopausal and Reproductive Risk Factors for Microscopic Colitis-Results From the Nurses' Health Study.

Gastroenterology 2018 12 23;155(6):1764-1775.e2. Epub 2018 Aug 23.

Gastroenterology Unit, Massachusetts General Hospital, Boston, Massachusetts; Clinical and Translational Epidemiology Unit, Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; Karolinska Clinical Epidemiology Unit, Karolinska Institutet, Solna, Sweden. Electronic address:

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http://dx.doi.org/10.1053/j.gastro.2018.08.029DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6279488PMC
December 2018

Obesity and Weight Gain Since Early Adulthood Are Associated With a Lower Risk of Microscopic Colitis.

Clin Gastroenterol Hepatol 2018 Dec 6. Epub 2018 Dec 6.

Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Department of Medicine, Clinical Epidemiology Unit, Karolinska Institutet, Stockholm, Sweden. Electronic address:

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http://dx.doi.org/10.1016/j.cgh.2018.11.057DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6551326PMC
December 2018

Validating microscopic colitis (MC) in Swedish pathology registers.

Scand J Gastroenterol 2018 Dec 2;53(12):1469-1475. Epub 2019 Jan 2.

a Department of Paediatrics , Örebro University Hospital , Örebro , Sweden.

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http://dx.doi.org/10.1080/00365521.2018.1543446DOI Listing
December 2018

Pre- and perinatal stress and irritable bowel syndrome in young adults - A nationwide register-based cohort study.

Neurogastroenterol Motil 2018 11 7;30(11):e13436. Epub 2018 Aug 7.

Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden.

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http://doi.wiley.com/10.1111/nmo.13436
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http://dx.doi.org/10.1111/nmo.13436DOI Listing
November 2018

Sick Leave and Disability Pension in Prevalent Patients With Crohn's Disease.

J Crohns Colitis 2018 Nov;12(12):1418-1428

Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1093/ecco-jcc/jjy123DOI Listing
November 2018

Clinical and Cost Effectiveness of Online Cognitive Behavioral Therapy in Children With Functional Abdominal Pain Disorders.

Clin Gastroenterol Hepatol 2018 Nov 28. Epub 2018 Nov 28.

Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden; Department of Pediatric Gastroenterology and Nutrition, Sachs' Children's Hospital, Stockholm, Sweden.

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http://dx.doi.org/10.1016/j.cgh.2018.11.043DOI Listing
November 2018

Appendectomy and Risk of Subsequent Diverticular Disease Requiring Hospitalization: A Population-Based Case-Control Study.

Dis Colon Rectum 2018 Jul;61(7):830-839

Department of Medicine Solna, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden.

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http://dx.doi.org/10.1097/DCR.0000000000001086DOI Listing
July 2018

The role of avoidance behavior in the treatment of adolescents with irritable bowel syndrome: A mediation analysis.

Behav Res Ther 2018 06 28;105:27-35. Epub 2018 Mar 28.

Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, SE-171 77, Stockholm, Sweden; Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Norra Stationsgatan 69, SE-171 77, Stockholm, Sweden. Electronic address:

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http://dx.doi.org/10.1016/j.brat.2018.03.006DOI Listing
June 2018

Milk-Related Symptoms and Immunoglobulin E Reactivity in Swedish Children from Early Life to Adolescence.

Nutrients 2018 May 21;10(5). Epub 2018 May 21.

Center for Occupational and Environmental Medicine, Stockholm County Council, 113 65 Stockholm, Sweden.

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http://dx.doi.org/10.3390/nu10050651DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5986530PMC
May 2018

Incidence and Treatment of Patients Diagnosed With Inflammatory Bowel Diseases at 60 Years or Older in Sweden.

Gastroenterology 2018 02 2;154(3):518-528.e15. Epub 2017 Nov 2.

Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden; Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of Pediatric Gastroenterology and Nutrition, Sachs' Children and Youth Hospital, Stockholm, Sweden.

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http://dx.doi.org/10.1053/j.gastro.2017.10.034DOI Listing
February 2018

Restorative Surgery in Patients With Primary Sclerosing Cholangitis and Ulcerative Colitis Following a Colectomy.

Inflamm Bowel Dis 2018 02;24(3):624-632

Division of Surgery, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden.

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https://academic.oup.com/ibdjournal/article/24/3/624/4863699
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http://dx.doi.org/10.1093/ibd/izx048DOI Listing
February 2018

Combining Rome III criteria with alarm symptoms provides high specificity but low sensitivity for functional gastrointestinal disorders in children.

Acta Paediatr 2018 Feb 27. Epub 2018 Feb 27.

Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.

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http://dx.doi.org/10.1111/apa.14297DOI Listing
February 2018

Receiving early information and trusting Swedish child health centre nurses increased parents' willingness to vaccinate against rotavirus infections.

Acta Paediatr 2017 Aug 1;106(8):1309-1316. Epub 2017 Jun 1.

Stockholm County Council, Department of Communicable Disease Control and Prevention, Stockholm, Sweden.

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http://dx.doi.org/10.1111/apa.13872DOI Listing
August 2017

Exposure-Based Cognitive Behavior Therapy for Children with Abdominal Pain: A Pilot Trial.

PLoS One 2016 13;11(10):e0164647. Epub 2016 Oct 13.

Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden.

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0164647PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5063361PMC
May 2017

Validating inflammatory bowel disease (IBD) in the Swedish National Patient Register and the Swedish Quality Register for IBD (SWIBREG).

Scand J Gastroenterol 2017 Feb 31;52(2):216-221. Epub 2016 Oct 31.

a Department of Medical Epidemiology and Biostatistics , Karolinska Institutet , Stockholm , Sweden.

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http://dx.doi.org/10.1080/00365521.2016.1246605DOI Listing
February 2017

Internet-Delivered Cognitive Behavior Therapy for Adolescents With Irritable Bowel Syndrome: A Randomized Controlled Trial.

Am J Gastroenterol 2017 01 15;112(1):152-162. Epub 2016 Nov 15.

Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1038/ajg.2016.503DOI Listing
January 2017

Internet-delivered cognitive behavior therapy for children and adolescents: A systematic review and meta-analysis.

Clin Psychol Rev 2016 12 20;50:1-10. Epub 2016 Sep 20.

Division of Psychology, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1016/j.cpr.2016.09.005DOI Listing
December 2016

Reply.

Gastroenterology 2016 11 3;151(5):1039-1040. Epub 2016 Oct 3.

Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.

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http://dx.doi.org/10.1053/j.gastro.2016.09.043DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573631PMC
November 2016

Oral Contraceptive Use and Risk of Ulcerative Colitis Progression: A Nationwide Study.

Am J Gastroenterol 2016 11 11;111(11):1614-1620. Epub 2016 Oct 11.

Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1038/ajg.2016.464DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5097043PMC
November 2016

The Fate of Reconstructive Surgery Following Colectomy for Inflammatory Bowel Disease in Sweden: A Population-based Cohort Study.

J Crohns Colitis 2016 Oct 14;10(10):1165-71. Epub 2016 Mar 14.

Division of Surgery, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden Department of Surgery, County Council of Östergötland, Linköping, Sweden.

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http://dx.doi.org/10.1093/ecco-jcc/jjw073DOI Listing
October 2016

A population-based case-control study on statin exposure and risk of acute diverticular disease.

Scand J Gastroenterol 2016 10;51(2):203-10. Epub 2015 Sep 10.

g Unit of Epidemiology , Institute of Environmental Medicine, Karolinska Institutet , Stockholm , Sweden.

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http://dx.doi.org/10.3109/00365521.2015.1081274DOI Listing
August 2016

Irritable bowel syndrome and functional abdominal pain in five-year-old children are related to lifestyle.

Acta Paediatr 2016 Aug 24;105(8):971-8. Epub 2016 May 24.

Sachs' Children and Youth Hospital, Södersjukhuset, Stockholm, Sweden.

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http://dx.doi.org/10.1111/apa.13455DOI Listing
August 2016

Association Between Long-term Oral Contraceptive Use and Risk of Crohn's Disease Complications in a Nationwide Study.

Gastroenterology 2016 06 23;150(7):1561-1567.e1. Epub 2016 Feb 23.

Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Sweden.

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http://dx.doi.org/10.1053/j.gastro.2016.02.041DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4928680PMC
June 2016

Usefulness of symptoms to screen for celiac disease.

Pediatrics 2014 Feb 13;133(2):211-8. Epub 2014 Jan 13.

Departments of Public Health and Clinical Medicine, Epidemiology and Global Health.

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http://dx.doi.org/10.1542/peds.2012-3765DOI Listing
February 2014

[Studying rare outcomes].

Lakartidningen 2013 Feb 13-19;110(7):334-7

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May 2013

A large nationwide population-based case-control study of the association between intussusception and later celiac disease.

BMC Gastroenterol 2013 May 16;13:89. Epub 2013 May 16.

Clinical Epidemiology Unit, Department of Medicine, Karolinska University Hospital and Karolinska Institutet, Karolinska, Sweden.

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http://dx.doi.org/10.1186/1471-230X-13-89DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3661363PMC
May 2013

Antibodies against deamidated gliadin peptides and tissue transglutaminase for diagnosis of pediatric celiac disease.

J Pediatr Gastroenterol Nutr 2012 Dec;55(6):695-700

Department of Medicine, Clinical Epidemiology Unit, Karolinska Institutet, Stockholm, Sweden.

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http://dx.doi.org/10.1097/MPG.0b013e3182645c54DOI Listing
December 2012

Socioeconomic position and education in patients with coeliac disease.

Dig Liver Dis 2012 Jun 15;44(6):471-6. Epub 2012 Feb 15.

Sachs' Children's Hospital, Stockholm South General Hospital, Stockholm, Sweden.

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http://linkinghub.elsevier.com/retrieve/pii/S159086581200024
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http://dx.doi.org/10.1016/j.dld.2012.01.006DOI Listing
June 2012

Coeliac disease characteristics, compliance to a gluten free diet and risk of lymphoma by subtype.

Dig Liver Dis 2011 Nov 30;43(11):862-8. Epub 2011 Aug 30.

Sachs' Children's Hospital, Stockholm South General Hospital, Sweden.

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http://dx.doi.org/10.1016/j.dld.2011.07.012DOI Listing
November 2011

Coeliac disease and body mass index: a study of two Swedish general population-based registers.

Scand J Gastroenterol 2009 ;44(10):1198-206

Sachs' Children's Hospital, Stockholm South General Hospital, Stockholm, Sweden.

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http://www.tandfonline.com/doi/full/10.1080/0036552090313201
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http://dx.doi.org/10.1080/00365520903132013DOI Listing
March 2010

Increased risk of immune thrombocytopenic purpura among inpatients with coeliac disease.

Scand J Gastroenterol 2008 ;43(4):416-22

Sachs' Children's Hospital, Stockholm South General Hospital, Sweden.

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http://dx.doi.org/10.1080/00365520701814028DOI Listing
May 2008

Urinary tract infections in pregnant women with coeliac disease.

Scand J Gastroenterol 2007 Feb;42(2):186-93

Department of Paediatrics, Stockholm Söder Hospital, Sweden.

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http://dx.doi.org/10.1080/00365520600863506DOI Listing
February 2007

Coeliac disease and risk of renal disease-a general population cohort study.

Nephrol Dial Transplant 2006 Jul 30;21(7):1809-15. Epub 2006 Mar 30.

Department of Paediatrics, Orebro University Hospital, Sweden.

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http://dx.doi.org/10.1093/ndt/gfl117DOI Listing
July 2006