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. Author manuscript; available in PMC: 2012 May 1.

Published in final edited form as: J Occup Environ Med. 2011 May;53(5):506–510. doi: 10.1097/JOM.0b013e31821854da

Table 2.

Associations between Toenail Mn (μg/g), pre-workshift blood and urine Mn (ng/ml), and Mn-CEI (mg/m³-hr) exposure windows.

	Partial Correlation^a
	Toenail Mn, μg/g		Blood Mn, ng/ml		Urinary Mn, ng/ml

	ρ	P-value	ρ	P-value	ρ	P-value
	(n = 21)
Blood Mn, ng/ml	0.11	0.66	1.00

	(n = 21)		(n = 27)
Urinary Mn, ng/ml	−0.18	0.46	0.33	0.10	1.00

Mn-CEI, mg/m³-hr	(n = 49)		(n = 27)		(n = 27)
− Months 1–6	0.07	0.62	0.05	0.82	−0.04	0.84
− Months 7–9	0.35	0.016	0.12	0.58	0.02	0.94
− Months 10–12	0.32	0.031	0.17	0.42	0.06	0.77
− Months 7–12	0.32	0.027	0.07	0.75	0.01	0.97
− Past 12 months	0.19	0.19	0.15	0.46	−0.01	0.98

^a

Adjusted for age (year) and dietary Mn (mg/month). Spearman correlations were used when toenail Mn or CEI was involved.