Table 2:

The range and mean/median exposures for the most prevalent substances (n = 21 – 836)

Exposure levels
Substance	n	Geomean or median* (ng/mL)	95% CI	Range (ng/mL)
Cotinine	836	144.4	124.6 – 167.3	4.0 – 4157.0
THCCOOH	286	59.3	49.4 – 73.7	3.3 – 2547.9
THCOH	152	96.5 *	79.4 – 121.0	20.2 – 3601.6
Benzoylecgonine	95	7.5 *	6.2 – 10.8	2.0 – 2971.4
Methamphetamine	48	59.3	32.7 – 107.7	4.2 – 1904.6
Morphine	50	218.6	121.3 – 393.9	8.90 – 9222.6
Fentanyl	42	20.4	10.3 – 40.4	0.8 – 846
Norfentanyl	56	118.4	58.6 – 239.4	4.3 – 9265.1
Methadone	22	357.7 *	307.2 – 420.7	3.8 – 491.1
EDDP	21	1078.6 *	706.1 – 1565.1	48.7 – 4799.6
Buprenorphine	46	121.5	79.8 – 185.1	6.1 – 1419.9
Norbuprenorphine	49	607.1 *	340.7 – 879.6	17.1 – 5105.9