
Attachment Loss Extent Constructs

Pocket Depth Extent Constructs


Severity Threshold

#AL ≥ Threshold

%AL ≥ Threshold

Sum AL ≥ Threshold

Mean AL ≥ Threshold

#PD ≥ Threshold

%PD ≥ Threshold

Sum PD ≥ Threshold

Mean PD ≥ Threshold

2 mm

0.39 (A,C)

0.48 (A)

0.47 (A)

0.30 (A)

0.16 (A,E,F)

0.42 (A)

0.40 (A,C)

0.49 (A)

3 mm

0.48 (B)

0.48 (A)

0.46 (A)

0.21 (B)

0.51 (B)

0.61 (B)

0.48 (B)

0.25 (B,D)

4 mm

0.40 (A)

0.30 (B)

0.38 (B)

0.27 (A)

0.39 (C)

0.39 (A)

0.39 (A)

0.34 (C)

5 mm

0.39 (A)

0.29 (B)

0.34 (C)

0.23 (B)

0.39 (C)

0.38 (A)

0.35 (C)

0.28 (D)

6 mm

0.33 (C)

0.26 (B)

0.29 (D)

0.25 (B)

0.28 (D)

0.26 (C)

0.24 (D)

0.27 (D)

7 mm

0.29 (D)

0.23 (C)

0.25 (E)

0.26 (A,B)

0.18 (E)

0.20 (D)

0.19 (E)

0.18 (E)

8 mm

0.28 (D)

0.24 (B,C)

0.23 (F)

0.24 (A,B)

0.14 (F)

0.16 (D)

0.15 (F)

0.15 (E)

 Bacterial burden is the dependent variable for all 56 correlations presented. All 56 correlation coefficients are statistically significantly different than zero (pvalue < 0.0001 for null hypothesis Ho: ρ = 0). Pairwise comparisons were performed between all seven correlation coefficients within each extent periodontal construct (represented in columns), to see if severity threshold impacted strength of correlation (Ho: ρ_{1i} = ρ_{2i},); coefficients that do not share a common letter are statistically significantly different (p < 0.05)  based on methods for comparing correlated correlation coefficients from Meng et al.(Meng et al. 1992) For example, the correlation between bacterial burden (the common dependent variable) and %PD ≥ 3 mm (r = 0.61) is statistically significantly different than the correlation between bacterial burden and %PD ≥ 4 mm (r = 0.39).