Table 2.

Changes in clinical parameters (mean ± SD) after non-surgical periodontal therapy according to stress level category

Variable	Baseline			Re-evaluation
	Minor stress level (n = 63)	Major stress level (n = 27)	p-value	Minor stress level (n = 63)	Major stress level (n = 27)	p-value
N° teeth	26.4 ± 3.2	26.0 ± 2.6	0.338	25.7 ± 3.4**	25.4 ± 2.8*	0.337
FMBS, %	66.1 ± 23.9	69.6 ± 21.6	0.573	20.2 ± 8.2**	39.8 ± 12.8**	< 0.001
FMPS, %	68.7 ± 20.3	69.5 ± 22.0	0.711	20.2 ± 10.2**	24.1 ± 10.9**	0.105
Sites with PPD ≥ 6 mm	26.2 ± 20.8	29.8 ± 24.6	0.815	8.1 ± 6.7**	12.5 ± 8.8**	0.020
Sites with PPD 4–5 mm	48.8 ± 21.6	28.3 ± 18.1	0.771	27.4 ± 16.2**	32.3 ± 15.6**	0.141
Sites with PPD ≤ 3 mm	82.5 ± 29.9	77.0 ± 28.6	0.337	119.2 ± 29.6**	106.8 ± 23.5**	0.012
PPD, mm	3.8 ± 0.9	4.0 ± 0.6	0.193	2.9 ± 0.5**	3.3 ± 0.5**	0.001
CAL, mm	4.4 ± 1.4	4.7 ± 1.3	0.059	3.8 ± 1.0**	4.4 ± 1.2*	0.013

Abbreviations: CAL, clinical attachment level; FMPS, full-mouth plaque score; FMBS, full-mouth bleeding score; PPD, probing pocket depth; SD, standard deviation

*=p <0.05, changes against the baseline; **=p <0.001, changes against the baseline