Table 2.

Mercury biomarker levels in total and stratified population.

	n	Mean	St dev	25th %	50th %	75th %	90th %	95th %
HAIR MERCURY (μg/g)
Total	262	0.45	0.53	0.14	0.28	0.55	1.06	1.31
NHANESa	1726	0.47		0.09	0.19	0.42	1.11	1.73
Gender
Males	99	0.65	0.71	0.24	0.50	0.83	1.33	1.43
Females	163	0.33c	0.34	0.11	0.21	0.43	0.82	1.06
Occupation
Dentists	114	0.64	0.69	0.25	0.48	0.83	1.31	1.69
Non-Dentists	148	0.30c	0.29	0.11	0.19	0.39	0.72	1.00
Medication
No BP Meds	223	0.41	0.51	0.13	0.26	0.51	0.95	1.31
BP Meds	39	0.66b	0.63	0.21	0.56	0.90	1.22	1.39
URINE MERCURY (μg/L)
Total	262	0.94	0.99	0.31	0.63	1.18	2.09	2.76
NHANESa	1529				0.48	1.12	2.20	3.33
Gender
Males	99	1.27	1.22	0.51	0.85	1.50	2.66	4.87
Females	163	0.74c	0.75	0.26	0.47	0.98	1.76	2.20
Occupation
Dentists	114	1.26	1.19	0.49	0.85	1.53	2.56	4.47
Non-Dentists	148	0.69c	0.70	0.25	0.44	0.92	1.61	2.00
Medication
No BP Meds	223	0.93	1.02	0.29	0.60	1.13	1.94	3.54
BP Meds	39	1.01	0.79	0.38	0.66	1.60	2.35	2.46

^aNHANES – National Health and Nutrition Examination Survey. Urine data from CDC (2009); hair data from McDowell et al. (2004).

^bp < 0.01.

^cp < 0.001 for ANOVA comparing natural log-transformed values for paired categories (male vs. female, dentists vs. non-dentists, BP medication users vs. non-users).