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Document ID (ISN)111539
CIS number 11-0228
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 2011, No.6:8, 8p. 12 ref.
Internet access The_agreement.pdf [in English]
Abstract The correct assessment and classification of exposure is essential in epidemiology. The validity of exposure data obtained by the use of questionnaires is, however, seldom evaluated. This study on the possible health effects from mercury exposure in dental practice 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 examined 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. There was a marked difference between the pairs of employees working in the same clinic regarding the start and termination years for the different preparation methods, and this was partly independent of their occupation. 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; subjective assessment; dental services
Descriptors (secondary) questionnaire survey; medical examinations; reliability
Document type D - Periodical articles
Subject(s) Commerce, services, offices
Broad subject area(s) Chemical safety
Browse category(ies) Mercury and compounds
Health care services