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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: J Anal Toxicol. 2008 Oct;32(8):562–569. doi: 10.1093/jat/32.8.562

Figure 3.

Figure 3

Title: Mean daily creatinine-normalized THCCOOH concentrations according to group. Urine specimens were collected from cannabis users under continuous medical surveillance during cannabis abstinence for up to 30 days. Cannabis users were separated into three groups, 0–50 (panel A), 51–150 (panel B), and >150 ng/mg (panel C) according to creatinine-normalized THCCOOH concentrations in the first specimen collected at admission. The mean THCCOOH concentration was calculated for each participant each day; the mean concentration for the group was then calculated on a daily basis.