PMID- 30652120 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2364-3722 (Print) IS - 2196-9736 (Electronic) IS - 2196-9736 (Linking) VI - 7 IP - 1 DP - 2019 Jan TI - Registration bias in a clinical quality register. PG - E90-E98 LID - 10.1055/a-0806-7006 [doi] AB - Background and aims The quality of medical quality registers is poorly defined and lack of trust in data due to low completeness may be a major barrier against their use in quality improvement interventions. The aim of the current observational study was to explore how selective reporting may influence adverse events registered in the Norwegian quality register for colonoscopy (Gastronet). Materials and methods Gastronet's database includes data provided by endoscopists, nurses and patients. All outpatient colonoscopies reported to Gastronet in 2015 were included and compared to the total number of colonoscopies performed in Norway as retrieved from the National Patient Registry. Hospitals were categorized into four groups according to reporting completeness < 50 %, 50 % to 69 %, 70 % to 89 % and >/= 90 %. The number of recorded adverse events (AEs) and procedure time were analyzed. Multivariate logistic regression models were fitted to explore independent factors for selection bias. Results A total of 22,364 colonoscopies were reported to the National Patient Register of which 15,855 (71 %) were registered in Gastronet. Feedback was received from 11,079 patients (50 %). The frequency of AEs increased from 0.6 % in completeness group < 50 % to 1.6 % in completeness group >/= 90 % ( P < 0.001). Long colonoscopy procedure time was associated with low reporting completeness. Patient feedback was associated with older age, cecal intubation success and sedation-free colonoscopy. Conclusion Incomplete registration in a colonoscopy quality register is associated with underreporting of AEs. Longer procedure time, a surrogate marker for time constraint, is associated with low completeness. FAU - Hoff, Geir AU - Hoff G AD - Telemark Hospital, Skien, Norway. AD - University of Oslo, Institute of Clinical Medicine, Oslo, Norway. FAU - de Lange, Thomas AU - de Lange T AD - University of Oslo, Institute of Clinical Medicine, Oslo, Norway. AD - Oslo University Hospital, Oslo, Norway. FAU - Bretthauer, Michael AU - Bretthauer M AD - University of Oslo, Institute of Health and Society, Oslo, Norway. AD - Frontier Science Boston, Boston, Massachusetts, United States. FAU - Dahler, Stein AU - Dahler S AD - Telemark Hospital Notodden, Notodden, Norway. FAU - Halvorsen, Fred-Arne AU - Halvorsen FA AD - Drammen Hospital, Drammen, Norway. FAU - Huppertz-Hauss, Gert AU - Huppertz-Hauss G AD - Telemark Hospital, Skien, Norway. FAU - Hoie, Ole AU - Hoie O AD - Sorlandet Hospital, Kristiansand, Norway. FAU - Kjellevold, Oystein AU - Kjellevold O AD - Telemark Hospital Kragero, Kragero, Norway. FAU - Mortiz, Volker AU - Mortiz V AD - Telemark Hospital, Skien, Norway. FAU - Sandvei, Per AU - Sandvei P AD - Ostfold Hospital, Gralum, Norway. FAU - Seip, Birgitte AU - Seip B AD - Vestfold Hospital, Tonsberg, Norway. FAU - Holme, Oyvind AU - Holme O AD - Sorlandet Hospital, Kristiansand, Norway. LA - eng PT - Journal Article DEP - 20190115 PL - Germany TA - Endosc Int Open JT - Endoscopy international open JID - 101639919 PMC - PMC6333534 COIS- Competing interests Dr. Hoff received payment from AMGEN Norway in 2017 for giving a lecture in 2017. EDAT- 2019/01/18 06:00 MHDA- 2019/01/18 06:01 PMCR- 2019/01/01 CRDT- 2019/01/18 06:00 PHST- 2018/05/11 00:00 [received] PHST- 2018/10/02 00:00 [accepted] PHST- 2019/01/18 06:00 [entrez] PHST- 2019/01/18 06:00 [pubmed] PHST- 2019/01/18 06:01 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.1055/a-0806-7006 [doi] PST - ppublish SO - Endosc Int Open. 2019 Jan;7(1):E90-E98. doi: 10.1055/a-0806-7006. Epub 2019 Jan 15.