Table 3. Potential factors associated with serum bilirubin in multiple linear regression.

	Unstandardized cofficients		Standardized cofficients	t	P-value
	B	Std Error	Beta
Age	0.054	0.012	0.215	4.691	< 0.001
Body mass index	−0.197	0.080	−0.108	−2.464	0.014
Mean corpuscular hemoglobin	0.148	0.070	0.099	2.110	0.036
Serum iron	0.236	0.041	0.276	5.816	< 0.001
Serum copper	−0.343	0.053	−0.304	−6.517	< 0.001
Serum zinc	0.613	0.090	0.312	6.790	< 0.001

B: regression coefficient; Std Error: standard error.