Table 7. Multiple linear analysis of WBC counts level of benzene-exposed workers.

Variables	Beta	t	P
Gendera	−0.126	−1.935	0.054
Smokingb	0.145	2.415	0.016
Drinkingc	−0.136	−2.154	0.032
Aged	−0.154	−3.130	0.002
CEDe	−0.155	−3.162	0.002
GSTM1f	−0.114	−2.322	0.021
GSTT1f	−0.108	−2.202	0.028
rs 2031920g	−0.098	−1.336	0.182
rs 3813867h	−0.073	−1.005	0.316

^a Female vs male.

^b Smoker vs non-smoker.

^c Alcohol user vs alcohol non-user.

^d The older group vs younger group.

^e CED, cumulative exposed dose, which was continuous variable.

^f Null vs non-null.

^g TT+CT vs CC.

^h CC+CG vs GG.