. 2019 Feb 26;11(1):16–22. doi: 10.4047/jap.2019.11.1.16

Table 6. Multiple regression analysis for color difference (ΔE^*) between before and after glazing of materials.

Material	Variables	B	Std. Error	β	t	P value	Dependent Variable: ∆E^*
EM	∆L^*	−0.682	0.250	−0.561	−2.734	.015^*	F = 3.401 (P = .044^*) R = 0.624, R² = 0.389 Adj. R² = 0.275 Durbin-Watson = 1.811
	∆a^*	2.610	1.542	0.346	1.693	.110
	∆b^*	0.207	0.133	0.307	1.561	.138
ZP	∆L^*	−0.593	0.166	−0.650	−3.575	.003^*	F = 5.505 (P = .009^*) R = 0.713, R² = 0.508 Adj. R² = 0.416 Durbin-Watson = 1.722
	∆a^*	0.676	0.945	−0.136	−0.716	.484
	∆b^*	−0.110	0.138	−0.151	−0.797	.437

EM: IPS e.max Press, ZP: IPS e.max ZirPress.

^*Significantly different compared to test groups (P < .05)

Table 6. Multiple regression analysis for color difference (ΔE*) between before and after glazing of materials.