Dombret B, Matthijs S, Sabzevar M Moradi
Free University of Brussels, School of Dental Medicine, Department of Periodontology, Laarbeeklaan 103, B-1090 Brusssels, Belgium.
J Clin Periodontol. 2003 Jul;30(7):630-5. doi: 10.1034/j.1600-051x.2003.00281.x.
Although many plaque scoring indices have been proposed for clinical or research purposes, only few of them are commonly used in the dental literature. Owing to the ordinal nature of these established indices, only nonparametric tests can be performed, while statistical analysts usually prefer parametric methodologies. Furthermore, these indices do not discriminate between the proximal and the broad surfaces of the teeth.
The aim of this study was to assess the interexaminer reproducibility for one established ordinal plaque index and two recently proposed interval-scaled indices.
Six subjects received a professional tooth cleaning and stopped all oral hygiene measures during 48-62 h. Accumulated plaque was disclosed and separately scored on all teeth except third molars by two examiners using the visual plaque index (VPI), the axial plaque extension index (APEI) and the proximal plaque extension index (PPEI). In total, 168 teeth (48 molars, 48 premolars, 24 canines and 48 incisors) were scored.
Statistically significant differences were found between the means of buccal VPI (p<0.05, Wilcoxon test), mesiobuccal, mesiolingual and distolingual APEI, and distobuccal, mesiolingual and distolingual PPEI (p<0.05, t-test). Spearman correlation values between the duplicate VPI measurements were 0.84 for buccal and 0.64 for lingual VPI, while Pearson correlation values varied between 0.51 and 0.83 for APEI and between 0.48 and 0.74 for PPEI. For VPI, 71% of the buccal (kappa=0.60) and 74% of the lingual (kappa=0.53) scores were identical. For APEI and PPEI scores, a linear regression was found with slopes ranging between 0.50 and 0.80. Mean measurement errors were 7.7% for buccal and 0.4% for lingual VPI, and ranged between 0.9% and 46.1% for APEI and PPEI.
The interexaminer reproducibility of all three indices showed fair to good agreement. Buccal VPI and buccal APEI in particular showed good agreement.
尽管已经提出了许多用于临床或研究目的的菌斑评分指数，但牙科文献中常用的却很少。由于这些既定指数的顺序性质，只能进行非参数检验，而统计分析人员通常更喜欢参数方法。此外，这些指数没有区分牙齿的邻面和宽阔表面。
本研究的目的是评估一种既定的顺序菌斑指数和两种最近提出的区间尺度指数在检查者之间的可重复性。
6名受试者接受了专业的牙齿清洁，并在48 - 62小时内停止了所有口腔卫生措施。累积的菌斑被染色，并由两名检查者使用视觉菌斑指数（VPI）、轴向菌斑扩展指数（APEI）和邻面菌斑扩展指数（PPEI）对除第三磨牙外的所有牙齿进行单独评分。总共对168颗牙齿（48颗磨牙、48颗前磨牙、24颗尖牙和48颗切牙）进行了评分。
颊侧VPI均值之间存在统计学显著差异（p<0.05，Wilcoxon检验），近中颊侧、近中舌侧和远中舌侧的APEI，以及远中颊侧、近中舌侧和远中舌侧的PPEI存在统计学显著差异（p<0.05，t检验）。重复测量的VPI之间，颊侧Spearman相关值为0.84，舌侧为0.64，而APEI的Pearson相关值在0.51至0.83之间，PPEI在0.48至0.74之间。对于VPI，71%的颊侧评分（kappa = 0.60）和74%的舌侧评分（kappa = 0.53）相同。对于APEI和PPEI评分，发现线性回归，斜率在0.50至0.80之间。颊侧VPI的平均测量误差为7.7%，舌侧为0.4%，APEI和PPEI的测量误差在0.9%至46.1%之间。
所有三种指数在检查者之间的可重复性显示出中等至良好的一致性。特别是颊侧VPI和颊侧APEI显示出良好的一致性。
