title: Reliability of self-reported questionnaire on occupational radiation practices among diagnostic radiologic technologists.
abstract: BACKGROUND
  We aimed to assess the reliability of a self-reported questionnaire on occupational radiation practices among radiologic technologists.
  
  
  METHODS
  We enrolled 941 participants who had repeatedly completed the questionnaire from the 2012-2013 radiologic technologists' health study in South Korea. We used percentage agreement, kappa statistics, and intraclass correlation coefficient (ICC) to assess the reliability of responses on work practices.
  
  
  RESULTS
  Overall agreement for ever-never diagnostic radiation procedures was high (87.5-97.5%), and κ values indicated substantial agreement (0.66-0.86) in all procedures except cephalometric and intraoral radiography. For the information of year of work start and working duration, high agreement was obtained (ICC: 0.99 and 0.98, respectively). However, use of a worn dosimeter and of personal protective equipment showed only moderate to substantial agreement.
  
  
  CONCLUSIONS
  Self-reported information on working practices regarding radiation exposure in radiologic technologists was reliable enough for epidemiologic studies. Am. J. Ind. Med. 60:377-385, 2017. © 2017 Wiley Periodicals, Inc.
authors.affiliation: Graduate School of Public Health, Korea University, Seoul, South Korea.
authors.forename: Moon Jung
authors.initials: MJ
authors.lastname: Kim
authors.affiliation: Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea.
authors.forename: Eun Shil
authors.initials: ES
authors.lastname: Cha
authors.affiliation: Department of Radiology, Seoul National University Bundang Hospital, Gyeonggi-do, South Korea.|Program in Biomedical Radiation Sciences, Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea.
authors.forename: Yousun
authors.initials: Y
authors.lastname: Ko
authors.affiliation: Graduate School of Public Health, Korea University, Seoul, South Korea.|Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea.
authors.forename: Byung Chul
authors.initials: BC
authors.lastname: Chun
authors.affiliation: Graduate School of Public Health, Korea University, Seoul, South Korea.|Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea.
authors.forename: Won Jin
authors.identifier: http://orcid.org/0000-0001-5059-5776
authors.initials: WJ
authors.lastname: Lee
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D016273:Occupational Exposure / Q000032:analysis*; D000069079:Radiation Exposure / Q000032:analysis*; D015203:Reproducibility of Results; D056910:Republic of Korea; D057566:Self Report / Q000592:standards*; D013679:Technology, Radiologic / Q000706:statistics & numerical data*
keywords: occupational exposure; questionnaire; radiation; radiologic technologists; reproducibility; worker