Table 1. Characteristics and clinical parameters of subjects.

	Healthy	Patients (Before)	P value†	Patients (After)	P value‡
Sex (female %)	36	36		33
Smoker (%)	18	18		22
Age	34.1±11.8§	34.5±11.7	P = 0.867	32.3±3.2	P = 0.301
Clinical attachment level (mm)	2.0±0.4‡	3.4±0.2	P<0.0001	2.3±0.2	P = 0.078
Bleeding on probing (%)	5.2±4.4‡	66.6±32.1	P<0.0001	11.6±9.0	P = 0.122

^†Mann-Whitney U test between healthy and patients with CP before treatment.

^‡Mann-Whitney U test between healthy and patients with CP after treatment.

^§Mean ± standard deviation.