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Document ID (ISN)111329
CIS number 10-0854
ISSN - Serial title 1745-6673 - Journal of Occupational Medicine and Toxicology
Year 2011
Convention or series no.
Author(s) Svendsen K., Hilt B.
Title The agreement between workers and within workers in regard to occupational exposure to mercury in dental practice assessed from a questionnaire and an interview
Bibliographic information Mar. 2011, 22p. 12 ref.
Internet access The_agreement_between_workers.pdf [in English]
Abstract In epidemiological studies, the validity of exposure data obtained from questionnaires is seldom evaluated. When conducting a study on the possible health effects from mercury exposure in dental practice, this study compared answers on exposure from a job-specific questionnaire with answers to the same questions given at an interview 6 to 18 months later. The concordance between workers was evaluated by comparing answers to the questionnaire given by persons working in the same clinics during the same time spans and the agreement within workers by comparing answers to the same questions from a questionnaire and from an interview. Other aims were to see if there was a difference in the answers to the questionnaire across job titles and to study the impact of missing information on the response rate in a detailed questionnaire. The results of this study indicate that a mailed questionnaire will cause misclassification of exposure. The observed occurrence of false positive exposure classifications from the questionnaire compared to the interview was higher than for false negative. This is important and may result in serious bias if the prevalence of exposure is low. Due to missing information, detailed questionnaires may also be inefficient if the goal is to construct exposure measures from combinations of several answers in the questionnaire.
Descriptors (primary) mercury and compounds; exposure evaluation; dental services
Descriptors (secondary) epidemiology; subjective assessment; questionnaire survey; reliability
Document type D - Periodical articles
Subject(s) Toxic and dangerous substances
Broad subject area(s) Chemical safety
Browse category(ies) Exposure evaluation
Mercury and compounds
Epidemiology