Table 3.

Spearman nonparametric correlation coefficients (rho) between BP parameters and interval variables

Variables	Systolic blood pressure		Diastolic blood pressure
	Rho coeff.	p value	Rho coeff.	p value
Maternal age	−0.041*	0.412	−0.020	0.685
Maternal education	−0.104	0.036	0.070	0.160
Prepregnancy BMI	−0.080	0.105	−0.102	0.039*
Blood cotinine level	0.080	0.105	0.014	0.783
Blood lead level	0.031	0.576	0.003	0.952

* Significant at p < 0.05