The psychosocial impact of dental aesthetics questionnaire (PIDAQ) is an efficient tool for assessment of oral health-related quality of life (OHRQoL). It evaluates the effect of dental esthetics on the psychosocial status of young adults. This questionnaire has been translated to many languages so far. However, it has not yet been translated to Persian. This study aimed to assess the validity and reliability of the Persian version of PIDAQ for use among the young adults. The questionnaire was translated to Persian, back-translated to English and underwent cultural adaptation and pretesting. It was then filled out by 398 young adults (215 females and 183 males) between 18 to 30 years in Shiraz, Iran. The Persian version of PIDAQ along with the index of orthodontic treatment need-aesthetic component (IOTN-AC) and the perception of occlusion (POS) index were administered among participants to assess its discriminant validity. Factor analysis extracted four domains and the factor loading of domains ranged from 0.479 to 0.837. The Cronbach’s alpha for the Persian version of PIDAQ ranged from 0.809 to 0.886. The mean score for each of the domains and the total score for PIDAQ, classified according to IOTN-AC and POS, showed a significant difference. The mean score acquired by subjects requiring orthodontic treatment was significantly higher than the score acquired by those not requiring orthodontic treatment (P = 0.00). The Persian version of PIDAQ has optimal validity, reliability and responsiveness for assessment of the psychosocial impact of malocclusion on the Iranian young adults.

中文翻译：

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波斯版牙科美学问卷的社会心理影响的有效性和可靠性

牙科美学调查表（PIDAQ）的社会心理影响力是评估与口腔健康相关的生活质量（OHRQoL）的有效工具。它评估了牙科美学对年轻人的心理状态的影响。迄今为止，该调查表已被翻译成多种语言。但是，它尚未被翻译成波斯语。这项研究旨在评估年轻人使用的PIDAQ波斯版的有效性和可靠性。问卷已翻译成波斯语，再翻译回英语，并进行了文化适应和预测试。然后，在伊朗设拉子18至30岁之间，有398位年轻人（215位女性和183位男性）填写了该手册。在参与者中使用波斯语版的PIDAQ以及正畸治疗需要美学成分的指数（IOTN-AC）和闭塞感指数（POS）来评估其判别效度。因子分析提取了四个域，域的因子负载范围为0.479至0.837。波斯版PIDAQ的Cronbach alpha范围为0.809至0.886。根据IOTN-AC和POS分类的每个域的平均得分和PIDAQ的总得分显示出显着差异。需要正畸治疗的受试者获得的平均得分显着高于不需要正畸治疗的受试者获得的得分（P = 0.00）。波斯版本的PIDAQ具有最佳的有效性，