Table 2.

Multiple linear regression analysis between apoptosis of periodontium cells, oxidative stress biomarkers, and Nrf2 in diabetic periodontitis and diabetes mellitus groups.

Independent variables	Dependent variable apoptosis of periodontium cells (%)
	Coef.	Std. err.	p value	95% CI
Constant	0.103	0.034	0.024	0.019	0.188
3-NT	0.034	0.005	<0.0001	0.023	0.045
4-HNE	0.022	0.004	0.001	0.013	0.032
8-OHdG	0.087	0.023	0.009	0.031	0.143
MDA	0.034	0.006	0.002	0.019	0.05
SOD	−0.618	0.183	0.015	−1.065	−0.17
Nrf2	−0.781	0.265	0.026	−1.429	−0.134

p < 0.001; R² = 0.838.