Effects of Periodontal Endoscopy-Assisted Nonsurgical Treatment of Periodontitis: Four-Month Results of a Randomized Controlled Split-Mouth Pilot Study

Table 4

Results of linear regression analysis at the patient level.

Variables		B	SE	95% CI		value
				Lower limit	Upper limit
Constant		56,71	13,489			<0.001
Age		0,03	0,063	0,911	1,165	0,635
Smoking	No	1,972	2,262	0,085	605,332	0,383
	Yes (reference)	0
Diabetes mellitus	No	−43,48	0	1,31E − 19	1,31E − 19	1
	Yes (reference)	0
Treatment group	nPE	−0,589	1,124	0,061	5,024	0,6
	PE (reference)	0
Operator	One	60,639	6342,559	0	1	0,992
	Two (reference)	0
Treatment order group	Early-treatment group	48,428	51,672	1,12E − 23	1,04E + 65	0,349
	Middle-treatment group	33,22	31,023	1,05E − 12	6,82E + 40	0,284
	Late-treatment group (reference)	0
Periodontitis staging	Stage III	−40,499	2983,526	0	1	0,989
	Stage IV (reference)	0
Periodontitis grading	Grade A	44,014	2983,527	0	1	0,988
	Grade B	45,61	2983,53	0	1	0,988
	Grade C (reference)	0
N of teeth at T0		−1,116	0,588	0,103	1,038	0,058
N of sites with BOP at T0		−4,733	3,632	7,13E − 06	10,862	0,193
Average PD at T0		−9,144	5,785	1,27E − 09	8,966	0,114
Average CAL at T0		10,755	6,016	0,355	6,192	0,074
N of sites with HDs at T0		−0,108	0,136	0,688	1,171	0,426

Bleeding on probing (mean BOP) at sites with PD ≥ 4 mm at T1 was considered as a dependent variable. Clinical attachment level (CAL); hard deposit (HD); test teeth without periodontal endoscopy treatment (nPE); test teeth with periodontal endoscopy treatment (PE); pocket probing depth (PD); baseline (T0); reevaluation visit after the end of nonsurgical periodontal therapy (T1). Regression coefficient (B), standard error (SE), odds ratio (OR): significant at (in bold).