Table 2

Correlation coefficient matrix of lead parameters, body height, work duration, life span in the work (%), and VPTs on hands and feet (natural log transformed) in a group of workers exposed to lead long term

	TWICL	Mean PbB	Max PbB	Current PbB	Height	Age	Duration	Worklife	LNHD	LNFT
ICL	0.69^2-160	0.63^2-160	0.57^2-160	0.51^2-160	0.13	0.32^2-160	0.79^2-160	0.74^2-160	−0.02	0.16^2-150
TWICL		0.97^2-160	0.92^2-160	0.76^2-160	0.14^2-150	0.06	0.19^2-160	0.18^2-160	0.06	0.21^2-160
Mean PbB			0.95^2-160	0.86^2-160	0.16^2-150	0.05	0.15^2-150	0.14^2-150	0.07	0.21^2-160
Max PbB				0.77^2-160	0.15^2-150	0.04	0.12	0.10	0.08	0.19^2-160
Current PbB					0.20^2-160	−0.01	0.13	0.13	0.01	0.15^2-150
Height						−0.11	0.11	0.16^2-150	−0.10	0.11
Age							0.41^2-160	0.09	0.26^2-160	0.33^2-160
Duration								0.94^2-160	−0.08	0.08
Worklife									−0.17^2-150	−0.01
LNHD										0.47^2-160

↵2-150 p<0.05;
↵2-160 p<0.01.
Worklife=life span in work (%); LNHD and LNFT=natural log transformed values of VPT on hands and feet, respectively.