Table 2.

Linear regression analysis of the association of demographic variables, oral and systemic conditions with CSF-1 (pg/ml) in saliva (n = 439).

Variables	Coefficient (β)	95% CI	p-value
Age	4.69	0.84–8.54	0.017
Smoking	−166.20	−329.24–−3.15	0.046
Tumor	417.12	90.27–743.97	0.012
Percentage of PD ≥4 mm	10.58	4.50–16.66	0.001
Manifest caries lesions	62.82	20.13–105.58	0.004

Variables included, but not retained, in the model: Sex, bleeding on probing, heart disease, hypertension, bowel disease, muscle and joint disease, mental illness, and diabetes. R² = 0.328.