Table 5.

Multiple regression analysis in the periodontitis group (with clinical attachment loss as predictor)

Variables	Coefficients	SE	t statistics	P	Lower 95%	Upper 95%	Regression statistics
Intercept	−4.325	4.372	−0.989	0.340	−13.770	5.120	Multiple R: 0.830
Age	0.007	0.022	0.336	0.741	−0.041	0.056	R2: 0.689
PI	−0.407	0.696	−0.584	0.568	−1.912	1.097	Adjusted R2: 0.546
BI	0.039	0.032	1.198	0.251	−0.031	0.110	SE: 0.659
PD	0.760	0.471	1.612	0.130	−0.258	1.779	F-test: 4.808
A-FABP	0.016	0.178	0.094	0.925	−0.369	0.403	P: 0.008*
TNF-α	0.0002	0.0001	1.455	0.169	−0.0001	0.0005

*Statistically significant. PI: Plaque index; BI: Bleeding index; PD: Probing depth; A-FABP: Adipocyte fatty acid-binding protein; TNF-α: Tumor necrosis factor alpha; SE: Standard error