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Validating microscopic colitis (MC) in Swedish pathology registers
Orebro Univ Hosp, Sweden.
Karolinska Inst, Sweden.
Karolinska Inst, Sweden; Stockholm South Gen Hosp, Sweden.
Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Surgery in Linköping.ORCID iD: 0000-0001-7518-9213
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2018 (English)In: Scandinavian Journal of Gastroenterology, ISSN 0036-5521, E-ISSN 1502-7708, Vol. 53, no 12, p. 1469-1475Article in journal (Refereed) Published
Abstract [en]

Objective: Microscopic colitis (MC), encompassing collagenous colitis (CC) and lymphocytic colitis (LC), is a diagnosis which relies on histopathologic criteria. This report examines the validity of having a diagnosis of MC in Swedish pathology registers. Methods: We reviewed patient charts from 215 randomly selected individuals from 15 pathology departments in five healthcare regions in Sweden with a relevant histopathology code for MC on colon biopsies. Information on clinical symptoms and laboratory data were obtained from medical chart review. We obtained sufficient data on 211 individuals for calculating positive predictive values (PPVs) for MC. Results: In total, 200/211 patients with a histopathology diagnosis of MC were confirmed as also having a clinical diagnosis of MC after chart review, yielding a PPV of 95% (95%CI =91-97%). The PPV for CC was 95% (95%CI =87-98%) and 85% for LC (95%CI =78-90%). The median age at biopsy was 67 years (range 17-90 years), and 72% (n = 154) were women. The most common symptoms in patients with MC histopathology were diarrhea (96% of patients), weight loss (24%) and abdominal pain (13%). Four percent (4/111) of patients with available data on stool culture were positive for gastrointestinal pathogens (none had Clostridium difficile). In 81 patients with available celiac serology, five (6%) were positive. Twenty-six percent of all patients had at least one other autoimmune disease, the most frequent being hypothyroidism (8%) and celiac disease (6%). Conclusions: This study found a high validity for MC as recorded in Swedish pathology registers.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2018. Vol. 53, no 12, p. 1469-1475
Keywords [en]
Microscopic colitis; collagenous colitis; lymphocytic colitis; validation; histopathology
National Category
Gastroenterology and Hepatology
Identifiers
URN: urn:nbn:se:liu:diva-154729DOI: 10.1080/00365521.2018.1543446ISI: 000456881600008PubMedID: 30600733OAI: oai:DiVA.org:liu-154729DiVA, id: diva2:1292248
Note

Funding Agencies|Stockholm County Council (ALF); Orebro County Council (ALF)

Available from: 2019-02-27 Created: 2019-02-27 Last updated: 2019-02-27

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Myrelid, Pär
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Division of Surgery, Orthopedics and OncologyFaculty of Medicine and Health SciencesDepartment of Surgery in Linköping
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