The use of ICD codes to identify IBD subtypes and phenotypes of the Montreal classification in the Swedish National Patient Register

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

(2019) Åsa H. Everhov et al.   SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY

Swedish Inflammatory Bowel Disease Register (SWIBREG) – a nationwide quality register

(2019) Jonas F. Ludvigsson et al.   SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY

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

(2018) Åsa H. Everhov et al.   GASTROENTEROLOGY

Development and validation of novel algorithms to identify patients with inflammatory bowel diseases in Israel: an epi-IIRN group study

(2018) Mira Y Friedman et al.   Clinical Epidemiology

Third European Evidence-based Consensus on Diagnosis and Management of Ulcerative Colitis. Part 1: Definitions, Diagnosis, Extra-intestinal Manifestations, Pregnancy, Cancer Surveillance, Surgery, and Ileo-anal Pouch Disorders

(2017) Fernando Magro et al.   Journal of Crohns & Colitis

The natural history of pediatric-onset IBD-unclassified and prediction of Crohn’s disease reclassification: a 27-year study

(2017) Firas Rinawi et al.   SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY

Childhood onset inflammatory bowel disease and risk of cancer: a Swedish nationwide cohort study 1964-2014

(2017) O Olén et al.   BMJ-British Medical Journal

Childhood onset inflammatory bowel disease and risk of cancer: a Swedish nationwide cohort study 1964-2014

(2017) O Olén et al.   BMJ-British Medical Journal

3rd European Evidence-based Consensus on the Diagnosis and Management of Crohn’s Disease 2016: Part 1: Diagnosis and Medical Management

(2016) Fernando Gomollón et al.   Journal of Crohns & Colitis

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

(2016) Gustav L. Jakobsson et al.   SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY

Pediatric IBD-unclassified Is Less Common than Previously Reported; Results of an 8-Year Audit of the EUROKIDS Registry

(2015) Dwight A. Winter et al.   INFLAMMATORY BOWEL DISEASES

Accuracy of Diagnostic Codes for Identifying Patients with Ulcerative Colitis and Crohn’s Disease in the Veterans Affairs Health Care System

(2014) Jason K. Hou et al.   DIGESTIVE DISEASES AND SCIENCES

Validation of international algorithms to identify adults with inflammatory bowel disease in health administrative data from Ontario, Canada

(2014) Eric I. Benchimol et al.   JOURNAL OF CLINICAL EPIDEMIOLOGY

External review and validation of the Swedish national inpatient register

(2011) Jonas F Ludvigsson et al.   BMC PUBLIC HEALTH

Validation of ICD-9-CM Diagnostic Codes for Inflammatory Bowel Disease Among Veterans

(2009) Selvi Thirumurthi et al.   DIGESTIVE DISEASES AND SCIENCES

The Swedish personal identity number: possibilities and pitfalls in healthcare and medical research

(2009) Jonas F. Ludvigsson et al.   EUROPEAN JOURNAL OF EPIDEMIOLOGY