Table 4.

Multiple regression analysis in the gingivitis group (with bleeding index as predictor)

Variable	Coefficients	SE	tstatistics	P	Lower 95%	Upper 95%	Regression statistics
Intercept	42.648	11.499	3.708	0.002*	17.805	67.491	Multiple R: 0.849
Age	0.255	0.204	1.248	0.233	−0.186	0.697	R2: 0.721
PI	4.266	7.465	0.571	0.577	−11.861	20.395	Adjusted R2: 0.592
PD	9.823	2.693	3.647	0.002*	4.004	15.641	SE: 4.306
CAL	8.370	3.520	2.377	0.033*	0.764	15.976	F-test: 5.602
A-FABP	−1.920	2.277	−0.843	0.414	−6.840	2.998	P: 0.004*
TNF-α	−0.000	0.001	−0.645	0.529	−0.003	0.002

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