Table 3.

Information on Heavy Metal Measurements From Hair Samples in MHAS 2018 (n = 2 671)

Heavy Metal	# Observations	Mean Concentration (mg/g)	SD	Min	Max	% Total Sample	n < LOD	%<LOD
Titanium	2 645	5.13	13.38	0.03	385.42	99.0%	26	1.0%
Vanadium	2 114	0.22	0.52	0.01	18.67	79.1%	557	20.9%
Chromium	2 499	0.42	1.07	0.03	22.71	93.6%	172	6.4%
Manganese	2 584	1.97	4.42	0.03	110.62	96.7%	87	3.3%
Cobalt	1 497	0.08	0.38	0.00	8.75	56.0%	1 174	44.0%
Nickel	2 557	1.25	3.11	0.04	61.93	95.7%	114	4.3%
Copper	2 645	12.34	24.34	0.02	429.70	99.0%	26	1.0%
Arsenic	663	0.09	0.23	0.01	5.01	24.8%	2 008	75.2%
Molybdenum	1 555	0.11	0.40	0.01	8.77	58.2%	1 116	41.8%
Silver	1 826	0.76	6.63	0.00	232.72	68.4%	845	31.6%
Cadmium	1 185	0.12	0.56	0.01	12.68	44.4%	1 486	55.6%
Antimony	712	0.14	0.85	0.01	17.13	26.7%	1 959	73.3%
Lead	2 624	3.82	86.63	0.01	4 273.50	98.2%	47	1.8%
Mercury	2 302	0.81	13.86	0.01	643.16	86.2%	369	13.8%

Note: LOD = limit of detection; MHAS = Mexican Health and Aging Study; SD = standard deviation.