Table 6.

The correlations between various clinical periodontal parameters in different initial PD groups.

		Age	Angle	Mesial/Distal	Initial PD	Initial Rec	Initial CAL
(a) Initial PD < 3 mm
Age	Pearson	1	−0.01	−0.10	0.16	0.38	0.36
	p value		0.948	0.571	0.339	0.019*	0.027*
Angle	Pearson	−0.11	1	0.32	0.12	0.34	0.32
	p value	0.948		0.053	0.475	0.034*	0.051
Mesial/Distal	Pearson	−0.10	0.32	1	−0.27	−0.10	−0.17
	p value	0.571	0.053		0.100	0.543	0.307
Initial PD	Pearson	0.16	0.12	−0.27	1	0.44	0.68
	p value	0.339	0.475	0.100		0.005*	0.000*
Initial Rec	Pearson	0.38	0.34	−0.10	0.44	1	0.96
	p value	0.019*	0.034*	0.543	0.005*		0.000*
Initial CAL	Pearson	0.36	0.32	−0.17	0.68	0.96	1
	p value	0.027*	0.051	0.307	0.000*	0.000*
(b) Initial PD 4∼6 mm
Age	Pearson	1	−0.17	−0.07	−0.08	0.36	0.33
	p value		0.219	0.637	0.544	0.006*	0.013*
Angle	Pearson	−0.17	1	0.19	0.20	0.28	0.35
	p value	0.219		0.169	0.151	0.037*	0.009*
Mesial/Distal	Pearson	−0.07	0.19	1	−0.10	−0.03	0.00
	p value	0.637	0.169		0.470	0.826	0.974
Initial PD	Pearson	−0.08	0.20	0.10	1	−0.16	0.19
	p value	0.544	0.151	0.470		0.238	0.169
Initial Rec	Pearson	0.36	0.28	−0.03	−0.16	1	0.94
	p value	0.006*	0.037*	0.826	0.238*		0.000*
Initial CAL	Pearson	0.33	0.35	0.00	0.19	0.94	1
	p value	0.013*	0.009	0.974	0.169*	0.000*
(c) Initial PD ≥ 7 mm
Age	Pearson	1	0.03	−0.46	−0.01	0.72	0.76
	p value		0.937	0.213	0.990	0.028*	0.017*
Angle	Pearson	0.03	1	0.67	0.59	−0.25	0.03
	p value	0.937		0.050*	0.092	0.513	0.940
Mesial/Distal	Pearson	−0.46	0.67	1	0.35	−0.50	−0.35
	p value	0.213	0.050*		0.351	0.170	0.351
Initial PD	Pearson	−0.01	0.59	0.35	1	−0.35	0.13
	p value	0.990	0.092	0.351		0.351	0.749
Initial Rec	Pearson	0.72	−0.25	−0.50	−0.35	1	0.88
	p value	0.028*	0.513	0.170	0.351		0.002*
Initial CAL	Pearson	0.76	0.03	−0.35	0.13	0.88	1
	p value	0.017*	0.940	0.351	0.749	0.002*

(a) Initial PD < 3mm, n = 38.

(b) Initial PD 4 ~ 6 mm, n = 55.

(c) Initial PD > 7mm, n = 9.

PD: Probing Depth; CAL: Clinical Attachment Level; Rec: Recession.

*p < 0.05.