Serum and salivary ferritin and Hepcidin levels in patients with chronic periodontitis and type 2 diabetes mellitus

Table 3 Multiple linear regression analysis of serum ferritin, hepcidin, and hepcidin/ferritin

	Model	b	S.E.	b’	t	P
Serum ferritin	Constant	503.687	108.718		4.633	< 0.001*
	Gender	−100.828	37.012	−0.265	− 2.724	0.008*
	Age	−4.991	1.582	−0.315	−3.154	0.002*
	absence or presence of CP	110.537	35.156	0.316	3.144	0.002*
Serum hepcidin	Constant	359.086	58.876		6.099	< 0.001*
	Gender	−54.760	19.875	−0.275	−2.755	0.007*
	Age	−1.946	0.819	−0.235	−2.376	0.020*
	HDL	−30.911	15.367	−0.203	−2.012	0.048*
	absence or presence of CP	47.604	18.327	0.260	2.598	0.011*
Serum hepcidin/ferritin	Constant	0.717	0.141		5.097	< 0.001*
	Age	0.008	0.002	0.354	3.391	0.001*
	absence or presence of CP	−0.143	0.052	−0.287	−2.752	0.007*

X₁: gender (1 = male, 2 = female); X₂: age (year); X₃: BMI; X₄: FBG (mg/dl); X₅: TG (mmol/l); X₆: CHOL (mmol/l); X₇: HDL (mmol/l); X₈: LDL (mmol/l); X₉:ALT (u/l); X₁₀:AST (u/l); X₁₁: absence or presence of CP (1 = non-CP; 2 = CP); X₁₂: absence or presence of T2DM (1 = non-DM; 2 = DM); X₁₃: duration of T2DM (0 = non-T2DM, 1 = 1–5 years, 2 = 6–10 years, 3 = more than 10 years)
Stepwise method used; ^*Significantly different P < 0.05

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