Table 4.

Logistic recessive analysis for possible biomarkers of embryotoxicity or spontaneous abortion

Toxic metals	Gravity ＜3*	Parity ＜2	History of miscarriage ＞2*	Blood level of Cd ＞0.4 µg/L*	Urine level of Cr ＞2 µg/L*
P value	0.003	0.247	0.001	0.003	0.031
OR( interval）	1.39 (1.17, 1.98)	1.72 (1.21, 4.62)	1.18 (1.06, 1.65)	1.26 (1.09, 1.85)	1.56 (1.23, 2.53)

^*Indicates the items of significant differences.