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dc.contributor.authorSutinen, S.-
dc.contributor.authorLahti, S.-
dc.contributor.authorNuttall, N.-
dc.contributor.authorSanders, A.-
dc.contributor.authorSteele, J.-
dc.contributor.authorAllen, P.-
dc.contributor.authorSlade, G.-
dc.identifier.citationEuropean Journal of Oral Sciences, 2007; 115(3):246-249-
dc.descriptionThe definitive version is available at
dc.description.abstractThe length of the reference period used in surveys of subjective oral health may have a marked influence on the responses obtained. We aimed to evaluate the effect of a 1-month (RP-1) vs. a 12-month (RP-12) reference period in the Oral Health Impact Profile (OHIP-14) questionnaire. Using a randomized cross-over design, RP-1 and RP-12 OHIP-14 questionnaires were administered, 1 month apart, to two samples of Finnish adults, namely people awaiting orthognathic surgery (n = 104) and non-patient workers (n = 111). The effect of the reference period was computed by subtracting RP-1 OHIP-14 severity scores from RP-12 OHIP-14 severity scores (ΔRP). Potential order effects were assessed by comparing ΔRP between groups completing the RP-1 vs. the RP-12 questionnaire first. Mean OHIP-14 severity scores were slightly higher when the RP-12 questionnaire was administered first, but mean ΔRP values were below the value of 2.5 considered clinically meaningful, and all 95% confidence intervals for ΔRP included zero. No order effects in the OHIP-14 severity scores were observed. Therefore, although a standardized reference period of 12 months is recommended, in population surveys the use of a shorter reference period does not appear to influence responses.-
dc.description.statementofresponsibilitySaila Sutinen, Satu Lahti, Nigel M. Nuttall, Anne E. Sanders, Jimmy G. Steele, P. Finbarr Allen, Gary D. Slade-
dc.publisherMunksgaard Int Publ Ltd-
dc.subjectDental Health Surveys-
dc.subjectSickness Impact Profile-
dc.subjectCross-Over Studies-
dc.subjectResearch Design-
dc.subjectTime Factors-
dc.subjectQuality of Life-
dc.subjectMiddle Aged-
dc.subjectOral Health-
dc.subjectSurveys and Questionnaires-
dc.titleEffect of a 1-month vs. a 12-month reference period on responses to the 14-item Oral Health Impact Profile-
dc.typeJournal article-
Appears in Collections:Aurora harvest 6
Dentistry publications

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