. Author manuscript; available in PMC: 2016 Dec 1.

Published in final edited form as: Ther Drug Monit. 2015 Dec;37(6):812–820. doi: 10.1097/FTD.0000000000000209

Table 1.

Demographic Data related to Individual Samples

	Standard vs. Milled methods	ELISA vs. LC/MS methods^*

Age groups
12–17 months	-	3 (23.1%)
24–27 months	3 (19%)	3 (23.1%)
36–40 months	5 (31%)	4 (30.7%)
48–64 months	8 (50%)	3 (23.1%)

Sex
male	3 (19%)	8 (61.5%)
females	13 (81%)	5 (38.5%)

Race
African-Americans	9 (56%)	6 (46.2%)
Caucasians	7 (44%)	7 (53.8%)

Health Insurance
Medicaid/Tenncare	7 (44%)	7 (53.8 %)
Other (private, employer, military, none)	9 (56%)	6 (46.2%)

Data for individual hair samples only (N=13)