Table3. Pairwise comparisons of cell viability in the six groups at 24 hours .

I Group	J Group	Mean difference	P value		95% CI
			Lower bound	Upper bound
OM (Control) (1)	VD (2)	5.87	0.2	2.28-	14.02
OM (Control) (1)	660 nm, 10 s (3)	5.78	0.2	1.96-	13.51
OM (Control) (1)	VD+ 660 nm, 10 s (4)	9.30	0.02	1.15	17.46
OM (Control) (1)	660 nm, 17 s (5)	20.62	0.000	12.88	28.35
OM (Control) (1)	VD+ 660 nm, 17 s (6)	30.84	0.000	23.11	38.58
VD (2)	660 nm, 10 s (3)	0.09	1.00	7.64-	7.82
VD (2)	VD+ 660 nm, 10 s (4)	3.43	0.07	4.72-	11.58
VD (2)	660 nm, 17 s (5)	14.74	0.000	7.00	22.48
VD (2)	VD+ 660 nm, 17 s (6)	24.98	0.000	17.24	32.71
660 nm, 10 s (3)	VD+ 660 nm, 10 s (4)	3.52	0.07	4.21-	11.26
660 nm, 10 s (3)	660 nm, 17s (5)	14.83	0.000	7.54	22.13
660 nm, 10 s (3)	VD+ 660 nm, 17 s (6)	25.07	0.000	17.78	32.36
VD+ 660 nm, 10 s (4)	660 nm, 17 s (5)	11.31	0.002	3.58	19.04
VD+ 660 nm, 10 s (4)	VD+ 660 nm, 17s (6)	21.54	0.000	13.81	29.28
660 nm, 17 s (5)	VD+ 660 nm, 17s (6)	10.23	0.003	2.94	17.52

OM: Osteogenic medium; VD: Vitamin D; CI: Confidence interval