Table 3.

Correlation between smoking and cadmium.

	Total		Without passive smoking		With passive smoking
	Pearson correlation coefficient	p value	Pearson correlation coefficient	p value	Pearson correlation coefficient	p value
Total
Cotinine, ng/mL	0.528	< 0.001	0.403	< 0.001	0.425	< 0.001
Smoking pack years	0.184	< 0.001	0.126	< 0.001	0.115	< 0.001
Current smoker
Cotinine, ng/mL	0.328	< 0.001	0.376	< 0.001	0.244	< 0.001
Smoking pack years	0.109	< 0.001	0.114	< 0.001	0.056	< 0.001
Former smoker
Cotinine, ng/mL	0.131	< 0.001	0.09	< 0.001	0.286	< 0.001
Smoking pack years	0.036	< 0.001	0.024	< 0.001	0.21	< 0.001
Never smoker
Cotinine, ng/mL	0.09	< 0.001	0.063	< 0.001	0.241	< 0.001