ความถูกต้องของดัชนีคุณภาพชีวิตที่สัมพันธ์กับสุขภาพช่องปากฉบับภาษาไทยในผู้ป่วยคนไทย / ณัฐวัฒน์ ชัยพจนพงศ์ = Validity of the Thai version of the oral health impact profile in Thai patients / Natthawat Chaiphotchanaphong
The objective of this study was to develop the Thai version of the Oral Health Impact Profile (Thai-OHIP) and to investigate its psychometric properties. The original English version of the OHIP was translated into Thai using a forward-backward method. A de novo development of Thai items was conducted to establish content validity. Five new items (‘bite cheeks’, 'dry mouth', 'clicking joint sounds', 'avoiding eating with others' and 'take longer time to complete a meal') were added. The Thai-OHIP with 54 items was further tested in a group of Thai dental patients (n = 600, aged 20-85 yrs). The relationships between Thai-OHIP summary scores, self-reported oral health, self-reported denture quality and six oral conditions (TMD pain, joint clicking, burning mouth sensation, halitosis, difficulty in opening the mouth and oral habits) were investigated for construct validity. The internal consistency and test-retest reliability (n = 60; at 2 week intervals) were investigated for reliability. All statistical tests were done at significant level 0.05. As a result, psychometric properties of Thai-OHIP were good. The findings of this study showed that educational level, tooth loss, oral status and denture status had a significant impact on oral health-related quality of life of Thai dental patients.