Table 4:

Pearson’s correlation matrix (r-values) between 14 ln-metals (defined as the natural logarithm of 1 + the metal concentration in placental tissues) (n = 374).

	Al	As	Ba	Cd	Co	Cu	Fe	Mn	Ni	Pb	Rh	Se	Ti	Zn

Al	1
As	0.00	1
Ba	0.10	−0.03	1
Cd	0.15^*	0.03	0.06	1
Co	0.2^*	−0.01	0.14^*	0.31^*	1
Cu	0.45^*	−0.04	0.14^*	0.32^*	0.43^*	1
Fe	0.27^*	0.00	0.08	0.18^*	0.22^*	0.62^*	1
Mn	0.35^*	−0.06	0.09	0.27^*	0.16^*	0.60^*	0.29^*	1
Ni	0.06	−0.09	0.06	0.14^*	0.20^*	0.37^*	0.26^*	0.27^*	1
Pb	0.26^*	−0.08	0.19^*	0.21^*	0.12^*	0.41^*	0.29^*	0.43^*	0.07	1
Rh	−0.01	−0.05	−0.08	0.01	−0.06	−0.02	0.02	0.04	−0.02	0.00	1
Se	0.24^*	0.01	0.12^*	0.27^*	0.40^*	0.70^*	0.43^*	0.23^*	0.31^*	0.08	−0.02	1
Ti	0.00	−0.04	−0.01	−0.02	0.00	−0.02	−0.05	−0.02	−0.09	0.05	0.09	0.00	1
Zn	0.34^*	−0.05	0.31^*	0.26^*	0.53^*	0.69^*	0.42^*	0.35^*	0.41^*	0.20^*	−0.11^*	0.65^*	−0.01	1

Significant correlations:

p<0.05