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BMC Oral Health
Published in: BMC Oral Health 1/2017

Open Access 01-12-2017 | Research article

Validity of self-reported number of teeth and oral health variables

Authors: Daisuke Matsui, Toshiro Yamamoto, Masaru Nishigaki, Fumitaro Miyatani, Isao Watanabe, Teruhide Koyama, Etsuko Ozaki, Nagato Kuriyama, Narisato Kanamura, Yoshiyuki Watanabe

Published in: BMC Oral Health | Issue 1/2017

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Abstract

Background

Oral condition and number of teeth were investigated by questionnaire in the Japan Multi-Institutional Collaborative Cohort (J-MICC Study). The aim of the present study was to assess the validity of the tooth number measure by comparing the self-reported number of teeth with the number of teeth determined at clinical dental examination.

Methods

A self-administered questionnaire and dental examination were performed by 1275 participants of a company medical examination who requested dental check-up and 377 subjects of the J-MICC study. The validity of the tooth number measure was assessed by comparing the self-reported number of teeth with that determined at clinical examination. Spearman’s rank correlation coefficient was calculated to quantitatively evaluate the validity.

Results

In males, the mean clinically-examined and self-reported numbers of teeth were 26.5 and 24.8 teeth, respectively. In females, the mean clinically-examined and self-reported numbers of teeth were 26.4 and 25.5 teeth, respectively. There was a tendency toward underestimation of the number of natural teeth by self-reporting. A significant correlation was observed between the clinically-examined and self-reported numbers of teeth in total (ρ = 0.69) and both males (ρ = 0.70) and females (ρ = 0.67).

Conclusions

The self-reported oral health variables were valid and reflected clinical status. Further revision of the question on the remaining tooth in the questionnaire improves the validity of self-reported number of teeth.
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Metadata
Title
Validity of self-reported number of teeth and oral health variables
Authors
Daisuke Matsui
Toshiro Yamamoto
Masaru Nishigaki
Fumitaro Miyatani
Isao Watanabe
Teruhide Koyama
Etsuko Ozaki
Nagato Kuriyama
Narisato Kanamura
Yoshiyuki Watanabe
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Oral Health / Issue 1/2017
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-016-0248-2

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