Table 2a.

Intragroup comparison of salivary tumor necrosis factor-alpha levels from baseline and 8 weeks after treatment

Groups	Time interval	n	Mean±SD	Mean difference	95% CI		t	df	P
					Lower	Upper
A1	Baseline	16	14.42±2.53	5.14	0.59	1.74	4.33	15.0	<0.01*
	8 weeks	16	9.13±1.72
A2	Baseline	14	14.43±1.85	4.38	1.04	2.20	6.02	13.0	<0.001*
	8 weeks	14	10.04±1.86
B1	Baseline	14	21.05±2.60	6.87	4.87	8.22	8.45	13.0	<0.001*
	8 weeks	14	14.18±2.43
B2	Baseline	16	21.59±2.25	7.99	4.45	11.52	4.82	15.0	<0.001*
	8 weeks	16	12.36±2.29

*Paired t-test, value of P is considered statistically significant P<0.05. n – Number of participants; SD – Standard deviation; t – t statistic value; df – Degrees of freedom; P – Probability; T2DM – Type 2 diabetes mellitus; A1 – Periodontitis participants receiving scaling and root planing alone; A2 – Periodontitis participants receiving scaling and root planing with adjunctive low-level laser therapy; B1 – Periodontitis participants with T2DM receiving scaling and root planing alone; B2 – Periodontitis participants with T2DM receiving scaling and root planing with adjunctive low level-laser therapy; CI – Confidence interval