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ORIGINAL ARTICLE
Year : 2013  |  Volume : 16  |  Issue : 1  |  Page : 28-31

Test-retest reliability of a questionnaire to assess the knowledge and attitude of dental students toward tobacco counseling services


Department of Periodontics, University of Benin, Benin City, Edo State, Nigeria

Correspondence Address:
C C Azodo
Department of Periodontics, New Dental Complex, University of Benin Teaching Hospital, P.M.B. 1111 Ugbowo, Benin City, Edo State - 300 001
Nigeria
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1118-8561.112066

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Objective: To determine the test-retest reliability of a new questionnaire designed to assess the attitude of students in a Nigerian dental school to tobacco cessation services. Materials and Methods: A self-administered questionnaire was administered twice at 4 weeks interval to the same set of final year dental students (N = 36) in one of the Nigerian dental schools. Ten questions were randomly selected from the 35-item questionnaire. Intra-class correlation (ICC) coefficients at 95% confidence interval were computed for each selected item and the Cronbach's alpha coefficients were calculated to assess the internal consistency of the questionnaire. Results: The results showed that the least Cronbach's alpha value was 0.49 and the highest was 0.98. Only two items had less than a substantial agreement level (<0.60) and seven items had an almost perfect agreement level (>0.80). The results also indicated that the ICC coefficient is very highly statistically significant (P < 0.001). Conclusion: The questionnaire demonstrated adequate test-retest reliability to assess the attitude of dental students to tobacco cessation services.


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