BACKGROUND Oral health literacy is an important construct for both clinical and public health outcomes research. The need to quantify and test OHL has led to the development of measurement instruments and has generated a substantial body of recent literature. A commonly used OHL instrument is REALD-30, a word recognition scale that has been adapted for use in several languages. The objective of this study was the development and testing of the Greek language oral health literacy measurement instrument (GROHL). METHODS Data from 282 adult patients of two private dental clinics in Athens, Greece were collected via in-person interviews. Forty-four words were initially considered and tested for inclusion. Item response theory analysis (IRT) and 2-parameter logistic models assessing difficulty and discriminatory ability were used to identify an optimal scale composition. Internal consistency was examined using Cronbach's alpha and test-retest reliability was measured using intraclass correlation coefficient (ICC) in a subset of 20 participants over a two-week period. Convergent validity was tested against functional health literacy screening (HLS) items, dental knowledge (DK), oral health behaviors (OHBs), oral health-related quality of life (OHRQoL; OHIP-14 index), as well as self-reported oral and general health status. RESULTS From an initial item pool of 44 items that were carried forward to IRT, 12 were excluded due to no or little variance, 10 were excluded due to low item-test correlation, and 2 due to insignificant contribution to the scale, i.e., difficulty parameter estimate with p > 0.05. The twenty remaining items composed the final index which showed favorable internal consistency (alpha = 0.80) and test-retest reliability (ICC = 0.95). The summary score distribution did not depart from normality (p = 0.32; mean = 11.5; median = 12; range = 1-20). GROHL scores were positively correlated with favorable oral hygiene behaviors and dental attendance, as well as HLS, DK and education level. CONCLUSION The GROHL demonstrated good psychometric properties and can be used for outcomes research in clinical and public health settings.

中文翻译：

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开发希腊口腔健康素养测量工具：GROHL。

背景技术口腔健康素养是临床和公共健康结果研究的重要构造。量化和测试OHL的需求导致了测量仪器的发展，并产生了大量的最新文献。常用的OHL仪器是REALD-30，这是一种单词识别标尺，已经过调整，可用于多种语言。这项研究的目的是开发和测试希腊语口腔健康素养测量仪（GROHL）。方法通过面对面访谈收集了希腊雅典两个私人牙科诊所的282名成年患者的数据。最初考虑并测试了44个单词，并对其进行了测试。项目反应理论分析（IRT）和评估难度和判别能力的2参数逻辑模型用于确定最佳规模构成。使用Cronbach's alpha检查内部一致性，并使用类内相关系数（ICC）在两周的时间内对20名参与者的子集进行重新测试的信度。针对功能健康素养筛查（HLS）项，牙科知识（DK），口腔健康行为（OHB），与口腔健康相关的生活质量（OHRQoL; OHIP-14指数）以及自我报告的口腔健康进行了收敛效度测试和一般健康状况。结果从44个项目的初始项目库中结转至IRT，由于无差异或差异很小而排除了12个项目，由于项目-测试相关性低而排除了10个项目，和2是由于对量表的贡献不大，即难度参数估计p> 0.05。其余20个项目组成的最终指标显示出良好的内部一致性（alpha = 0.80）和重测可靠性（ICC = 0.95）。汇总分数分布没有偏离正态分布（p = 0.32；平均值= 11.5；中位数= 12；范围= 1-20）。GROHL得分与良好的口腔卫生行为和出勤率，HLS，DK和教育程度呈正相关。结论GROHL具有良好的心理测量特性，可用于临床和公共卫生场所的结局研究。80）和重测可靠性（ICC = 0.95）。汇总分数分布没有偏离正态分布（p = 0.32；平均值= 11.5；中位数= 12；范围= 1-20）。GROHL得分与良好的口腔卫生行为和出勤率，HLS，DK和教育程度呈正相关。结论GROHL具有良好的心理测量特性，可用于临床和公共卫生场所的结局研究。80）和重测可靠性（ICC = 0.95）。汇总分数分布没有偏离正态分布（p = 0.32；平均值= 11.5；中位数= 12；范围= 1-20）。GROHL得分与良好的口腔卫生行为和出勤率，HLS，DK和教育程度呈正相关。结论GROHL具有良好的心理测量特性，可用于临床和公共卫生场所的结局研究。