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Type: Journal article
Title: Effect of a 1-month vs. a 12-month reference period on responses to the 14-item Oral Health Impact Profile
Author: Sutinen, S.
Lahti, S.
Nuttall, N.
Sanders, A.
Steele, J.
Allen, P.
Slade, G.
Citation: European Journal of Oral Sciences, 2007; 115(3):246-249
Publisher: Munksgaard Int Publ Ltd
Issue Date: 2007
ISSN: 0909-8836
Statement of
Saila Sutinen, Satu Lahti, Nigel M. Nuttall, Anne E. Sanders, Jimmy G. Steele, P. Finbarr Allen, Gary D. Slade
Abstract: The 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.
Keywords: Humans
Dental Health Surveys
Sickness Impact Profile
Cross-Over Studies
Research Design
Time Factors
Quality of Life
Middle Aged
Oral Health
Surveys and Questionnaires
Description: The definitive version is available at
DOI: 10.1111/j.1600-0722.2007.00442.x
Appears in Collections:Aurora harvest 6
Dentistry publications

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