Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.
Medical Research Center Oulu, Oulu University Hospital, P.O. Box 5000, 90029, Oulu, Finland.
BMC Oral Health. 2018 Dec 11;18(1):210. doi: 10.1186/s12903-018-0666-4.
We examined the validity of self-reported number of teeth in middle-aged adults by using representative cohort data to compare corresponding self-reported and clinical values.
This validity study is part of the representative 46-year-old follow-up of the Northern Finland Birth Cohort 1966 (NFBC1966) Study. Mailed questionnaires (n = 5950) requested information on self-reported number of teeth and background variables (education, tooth brushing and smoking), while clinical oral health examinations (n = 1891) assessed the number of teeth (the 'gold standard'). The main analyses compared the self-reported and clinical values for the number of teeth in 1669 participants. Scatterplot and Bland-Altman plot served for visual analyses, and alternative correlation coefficients (Pearson, Spearman, intraclass) for numerical comparisons separately for men and women, with stratification according to background variables.
The clinical assessment revealed that the mean value for the number of teeth was 27.46 (SD = 2.38), while the corresponding value based on self-reported information was 27.48 (SD = 2.78). According to the Bland-Altman plot, the mean difference between the clinical and self-reported values was - 0.02 (95% limits of agreement, LoA: - 3.37 to 3.32). The observed ranges of intraclass correlation coefficients (ICC) among men and women were 0.72 to 0.95 and 0.72 to 0.85, respectively, depending on the background variables.
Self-reported number of teeth in middle-aged Finnish adults agreed closely with the corresponding clinical measure.
本研究使用代表性队列数据，通过比较自我报告的牙齿数量和相应的临床值，来检验中年成年人自我报告牙齿数量的有效性。
本有效性研究是芬兰北部出生队列 1966 年（NFBC1966）研究 46 年随访的代表性研究的一部分。通过邮寄问卷（n=5950）的方式，要求参与者提供自我报告的牙齿数量和背景变量（教育程度、刷牙和吸烟情况）的信息，同时进行临床口腔健康检查（n=1891）以评估牙齿数量（“金标准”）。主要分析比较了 1669 名参与者的自我报告和临床牙齿数量值。散点图和 Bland-Altman 图用于直观分析，同时还分别针对男性和女性，根据背景变量进行分层，使用 Pearson、Spearman 和组内相关系数（intraclass）等替代相关系数对数值进行比较。
临床评估显示，牙齿数量的平均值为 27.46（SD=2.38），而基于自我报告信息的相应值为 27.48（SD=2.78）。根据 Bland-Altman 图，临床和自我报告值之间的平均差异为-0.02（95%置信区间（LoA）：-3.37 至 3.32）。根据背景变量的不同，观察到男性和女性的组内相关系数（ICC）范围分别为 0.72 至 0.95 和 0.72 至 0.85。
芬兰中年成年人自我报告的牙齿数量与相应的临床测量值密切一致。
