. 2015 Dec 23;9:431–437. doi: 10.2174/1874210601509010431

Table 4.

Associations (analytic) between Probes and corresponding Brushes. (n=446 exploration sites).

Probe versus Brush	Correlation^a	Comparison^b	Concordance^c
All (n=446)	rs=0.71, p<0.001	p=0.158	Q-W-Kappa=0.70 (95%-CI=0.65-0.75)
Molar (n=72)	rs=0.70, p<0.001	p=0.569	Q-W-Kappa=0.67 (95%-CI=0.52-0.78)
Premolar (n=199)	rs=0.69, p<0.001	p=0.089	Q-W-Kappa=0.67 (95%-CI=0.59-0.74)
Incisor (n=175)	rs=0.66, p<0.001	p=0.954	Q-W-Kappa=0.70 (95%-CI=0.61-0.76)

a: Spearman's rank correlation (r_s)

b: Wilcoxon paired rank test.

c: Quadratic weighted kappa, which can be evaluated against the Landis & Koch scale i.e. poor (<0.00), slight (0.00-0.20), fair (0.21-0.40), moderate (0.41-0.60), good (0.61-0.80), and excellent (0.81-1.00) [19].