Table I.

Levels of Cocaine and Chief Metabolites Classified by Length of Wear of Patches

	Drug-Using Experimental Group*			Non-Using Comparison Group†
Analyte	Mean‡	SD	N§	Mean	SD	N
Cocaine
½ h	0.00	0.00	22	0.00	0.00	4
1 h	0.17	0.83	22	0.00	0.00	5
1½ h	0.31	1.47	22	0.00	0.00	5
2 h	0.36	1.01	22	0.00	0.00	5
1 day	325.83	644.40	201	0.20	0.86	50
1 day (random)	384.91	812.41	44	0.00	0.00	10
3 day	816.93	1027.82	101	0.20	0.98	24
1 week	1195.00	338.13	43	0.00	0.00	10
2 week	1664.31	2330.26	19	5.83	11.45	4.00
Ecgonine methyl ester
½ h	0.00	0.00	22	0.00	0.00	4
1 h	0.00	0.00	22	0.00	0.00	5
1½ h	0.00	0.00	22	0.00	0.00	5
2 h	0.00	0.00	22	0.00	0.00	5
1 day	29.91	63.94	201	0.00	0.00	50
1 day (random)	33.72	66.03	44	0.00	0.00	10
3 day	83.11	115.28	101	0.00	0.00	24
1 week	116.99	131.51	43	0.00	0.00	10
2 week	210.96	279.52	19	0.00	0.00	4
Benzoylecgonine
½ h	0.00	0.00	22	0.00	0.00	4
1 h	0.00	0.00	22	0.00	0.00	5
1½ h	0.00	0.00	22	0.00	0.00	5
2 h	0.00	0.00	22	0.00	0.00	5
1 day	59.22	370.30	200	0.00	0.00	50
1 day (random)	25.51	50.10	44	0.00	0.00	10
3 day	168.16	461.69	101	0.00	0.00	24
1 week	181.90	348.16	43	0.00	0.00	10
2 week	723.61	748.63	19	0.00	0.00	4

^*22 subjects.

^†5 subjects.

^‡Analyte concentrations in nanograms per milliliter of sweat eluate.

^§Number of patches.