Table 2.

Intragroup comparison of clinical parameters from baseline and 8 weeks posttreatment

Group	Parameters	Time interval	Mean±SD	Mean difference	95% CI		t	df	P
					Lower	Upper
A1	PI	Baseline	1.73±0.45	1.04	0.75	1.33	7.73	15.0	<0.001*
		8 weeks	0.69±0.21
	BOP	Baseline	1.90±0.63	1.46	1.14	1.77	9.86	15.0	<0.001*
		8 weeks	0.44±0.17
	PD	Baseline	6.05±0.63	3.19	2.79	3.54	18.1	15.0	<0.001*
		8 weeks	2.88±0.41
	CAL	Baseline	6.06±0.66	2.18	2.79	3.56	17.7	15.0	<0.001*
		8 weeks	2.88±0.41
A2	PI	Baseline	1.71±0.51	1.11	0.81	1.41	8.04	13.0	<0.001*
		8 weeks	0.69±0.21
	BOP	Baseline	2.29±0.42	1.17	0.90	1.44	9.59	13.0	<0.001*
		8 weeks	1.12±0.48
	PD	Baseline	5.98±0.59	2.99	2.57	3.54	15.3	13.0	<0.001*
		8 weeks	2.99±0.43
	CAL	Baseline	2.99±0.43	3.03	2.58	3.49	14.4	13.0	<0.001*
		8 weeks	2.99±0.43
B1	PI	Baseline	2.00±0.66	1.62	1.26	1.97	9.92	13.0	<0.001*
		8 weeks	0.38±0.14
	BOP	Baseline	1.96±0.62	1.54	1.53	1.92	8.66	13.0	<0.001*
		8 weeks	0.43±0.17
	PD	Baseline	5.93±0.97	2.93	2.50	3.52	14.9	130	<0.001*
		8 weeks	3.00±0.48
	CAL	Baseline	6.15±0.94	3.03	2.68	3.38	18.9	13.0	<0.001*
		8 weeks	3.12±0.59
B2	PI	Baseline	2.14±0.57	1.83	1.55	2.10	14.30	15.0	<0.001*
		8 weeks	0.31±0.14
	BOP	Baseline	1.84±0.55	1.39	1.086	1.69	9.84	15.0	<0.001*
		8 weeks	0.45±0.12
	PD	Baseline	5.87±0.94	3.01	2.50	3.52	12.6	15.0	<0.001*
		8 weeks	2.86±0.44
	CAL	Baseline	5.97±1.00	3.04	2.55	3.53	13.3	15.0	<0.001*
		8 weeks	2.93±0.49

*Paired t-test; the value of P is considered statistically significant P<0.05. P – Probability; SD – Standard deviation; df – degrees of freedom; t – t statistics value; CI – Confidence interval; PI – Plaque index; BOP – Bleeding on probing; PD – Probing depth; CAL – Clinical attachment level; A1 – Patients with periodontitis receiving scaling and root planing; A2 – Patients with periodontitis receiving scaling and root planing as an adjunct to low-level laser therapy; B1 – Patients with periodontitis associated with type 2 diabetes mellitus receiving scaling and root planing; B2 – Patients with periodontitis associated with type 2 diabetes mellitus receiving scaling and root planing as an adjunct to low-level laser therapy