OBJECTIVES Dental implant treatment (DIT) improves peoples' oral health-related quality of life (OHQoL). Assessment of longitudinal changes in OHRQoL may be undermined by response shift (RS). RS is the process by which quality of life changes, independent of health status as a result recalibration, reprioritization or reconceptualization. Thus, this study aimed to describe RS in the OHRQoL and perceived oral health of individuals receiving DIT and to compare the then-test, a self-anchored scale and the classification and regression trees (CRT) approaches for assessing RS. METHODS OHRQoL was assessed in 100 patients receiving DIT using the OHIP-Edent (n = 100) and a self-anchored scale (n = 45) before placement of the final restoration and 3 to 6 months after treatment was completed. The OHIP-Edent was also used as a retrospective assessment at follow-up. CRT examined changes in the OHIP-Edent total score as a dependent variable with global changes in oral health and each OHIP-Edent subscale score as independent variables. RESULTS OHRQoL and perceived oral health improved after treatment. The OHIP-Edent score decreased from 36.4 at baseline to 12.7 after treatment. On average, participants recalibrated their internal standard downwards (- 4.0 OHIP-Edent points). CRT detected downwards recalibration in 5% of participants and upwards in 15%. Reprioritization was observed in the social disability and psychological discomfort aspects of OHRQoL. CONCLUSIONS RS affects longitudinal assessments of OHRQoL in DIT, reducing the apparent magnitude of change. The then-test and CRT are valid and complementary methods to assess RS.

中文翻译：

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人们对种植牙治疗的评价如何随时间变化？

目的种植牙治疗（DIT）可改善人们与口腔健康相关的生活质量（OHQoL）。OHRQoL的纵向变化的评估可能会因反应移位（RS）而受损。RS是重新定义，重新确定优先次序或重新概念化后的生活质量变化的过程，与健康状况无关。因此，本研究旨在描述OHRQoL中的RS，以及接受DIT的人的口腔健康状况，并比较当时的测试，自我锚定量表和分类和回归树（CRT）评估RS的方法。方法在放置最终修复体之前和治疗完成后3至6个月，使用OHIP-Edent（n = 100）和自锚评分（n = 45）对100名接受DIT的患者进行OHRQoL评估。OHIP-Edent在随访中也用作回顾性评估。CRT将OHIP-Edent总评分的变化作为因变量，将口腔健康状况的总体变化和每个OHIP-Edent分量表的分数作为自变量。结果治疗后OHRQoL和口腔健康状况得到改善。OHIP-Edent分数从基线的36.4降低到治疗后的12.7。平均而言，参与者将其内部标准向下重新校准（-4.0 OHIP-Edent点）。CRT在5％的参与者中检测到向下重新校准，在15％的参与者中检测到向上重新校准。在OHRQoL的社交障碍和心理不适方面，人们观察到了优先事项。结论RS影响DIT中OHRQoL的纵向评估，从而减少了变化的表象。然后测试和CRT是评估RS的有效和补充方法。