Table 4.

Correlation between systolic blood pressure, diastolic blood pressure, gestational period, hemoglobin, creatinine, and trace elements of the control group.

		Na	Ca	K	Zn	Fe
SBP	r	0.392	−0.204	−0.257	−0.239	−0.089
	p	0.002*	0.068	0.049*	0.068	0.504
DBP	r	0.240	−0.048	−0.205	−0.164	−0.086
	p	0.068	0.719	0.120	0.215	0.517
Gestational period	r	−0.190	−0.061	−0.219	0.040	−0.103
	p	0.149	0.228	0.096	0.765	0.436
Hemoglobin	r	−0.296	−0.160	−0.188	0.038	0.018
	p	0.023*	0.228	0.153	0.777	0.436
Creatinine	r	−0.033	0.125	0.244	−0.050	−0.137
	p	0.806	0.346	0.062	0.707	0.300

^* p < 0.05 means correlation is significant at a 0.05 level.