The Evaluation of Reliability a Questionnaire, FSPD-34 Type, for Periodontal Disease (2)

Abstract

FSPD-34, as a questionnaire to comprehensively diagnose periodontal disease at a worksite, was developed. It was based on the PRECEDE-PROCEED model. The questionnaire consists of 6 subscales that are mutually related. They comprise the sub-scale of QOL, self-assessment of periodontal disease, oral health behavior, predisposing factors, reinforcing factors and enabling factors. The purpose of the present study was to evaluate internal and test-retest reliability. Subjects were 324 factory workers aged between those in their 20s and those in their 60s who completed a questionnaire. Internal reliability of QOL and self-assessment of periodontal disease sub-scales were high (Cronbach's alpha, 0.70-0.79). However, those of other sub-scales were low. Seventy-six were selected from all subjects by systematic sampling for test-retest reliability. All sub-scales demonstrated good test-retest reliability (r = 0.68-0.83). However, the questionnaire should be improved, because some sub-scales demonstrated low internal reliability on a further investigation.