Table 3.

Comparison of Ni, Ba, Pb and Ti concentrations in pregnant women's blood between groups*.

Heavy metal	Case (μg/L)		Control (μg/L)		Z	P-value
	P50	P25–P75	P50	P25–P75
Ni	38.96	0.00, 192.57	25.58	0.00, 92.85	−1.605	0.108
Ba	108.99	51.69, 256.12	84.38	55.85, 135.79	−2.415	0.016
Pb	79.65	44.76, 113.84	69.67	43.53, 86.83	−1.706	0.088
Ti	371.91	188.85, 659.15	302.41	217.34, 389.95	−2.485	0.013

*Mann–Whitney U test.