Table 3.

Associations between single metals and PE.

Metals (μg/L)	Mild PE		Severe PE
	OR (95%CI)	P-value	OR (95%CI)	P-value
Zn
Low (<6111.84)	1.00	–	1.00	–
High (≥6111.84)	6.66(1.82,24.40)	0.004	0.53(0.15,1.89)	0.325
Mn
Low (<4991.59)	1.00	–	1.00	–
High (≥4991.59)	5.03(1.23,20.61)	0.025	40.39(6.97,234.06)	0.000
Ni
Low (<3804.87)	1.00	–	1.00	–
High (≥3804.87)	9.86E+08(2.10E+08,4.63E+09)	0.000	3.53E+09(3.53E+09,3.53E+09)	–
Cu
Low (<1926.55)	1.00	–	1.00	–
High (≥1926.55)	34.96(3.94,310.61)	0.001	227.64(19.06,2718.40)	0.000
Pb
Low (<165.15)	1.00	–	1.00	–
High (≥165.15)	7.07(1.53,32.72)	0.012	334.13(24.27,4601.10)	0.000
As
Low (<12.40)	1.00	–	1.00	–
High (≥12.40)	2.50(0.72,8.68)	0.148	15.79(3.51,70.98)	0.000
Cd
Low (<6.55)	1.00	–	1.00	–
High (≥6.55)	24.16(3.84,151.82)	0.001	0.08(0.01,0.47)	0.005
Hg
Low (<6.58)	1.00	–	1.00	–
High (≥6.58)	11.33(2.13,60.19)	0.004	278.87(24.38,3189.41)	0.000
Overall score
Low (<21.00)	1.00	–	1.00	–
High (≥21.00)	11.00(2.71,44.66)	0.001	19.99(4.20,95.21)	0.000

Adjusted for maternal education and gestational age.