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OPI 2000 (GC/MS specifications are the value of morphine or codeine): In this study, one hundred and five (105) negative and positive urine samples (0 to 50236 ng/ml) were tested and compared with GC/MS. The concentrations of two discrepant specimens were confirmed with GC/MS to be close to the cutoff value (1836 and 2041.5 ng/ml). The results are summarized below:

Positive Agreement: 97.6% and Negative Agreement: 98.4%

	(-)		(+)
Drug Screen	GC/MS Negative (0 ng/ml to 75%)	Near cutoff negative (75%- cutoff)	Near cutoff positive (cutoff to 125%)	GC/MS Positive (> 125%)	% Agreement with GC/MS
(+)	0	1	7	33	97.6 %
(-)	56	7	1	0	98.4 %
Total	56	8	8	33	98.1 %

Methamphetamine (GC/MS specifications are the value of methamphetamine): In this study, one hundred and fifteen (115) negative and positive urine samples (0 to 82106 ng/ml), were tested and compared with GC/MS. The concentrations of two discrepant specimens were confirmed with GC/MS to be close to the cutoff value (1007 and 1040 ng/ml). The results are summarized below:

Positive Agreement: 96.8% and Negative Agreement: 100%

	(-)		(+)
Drug Screen	GC/MS Negative (0 ng/ml to 75%)	Near cutoff negative (75%- cutoff)	Near cutoff positive (cutoff to 125%)	GC/MS Positive (> 125%)	% Agreement with GC/MS
(+)	0	0	4	57	96.8 %
(-)	8	8	2	0	100 %
44	56	8	6	57	98.3 %

Methadone (GC/MS specifications are the value of methadone): In this study, one hundred and five (105) negative and positive urine samples (0 to 22400 ng/ml), were tested and compared with GC/MS. The concentrations of two discrepant specimens were confirmed with GC/MS to be close to the cutoff value (215.5 and 325 ng/ml). The results are summarized below:

Positive Agreement: 96.1% and Negative Agreement: 100%

	(-)		(+)
Drug Screen	GC/MS Negative (0 ng/ml to 75%)	Near cutoff negative (75%- cutoff)	Near cutoff positive (cutoff to 125%)	GC/MS Positive (> 125%)	% Agreement with GC/MS
(+)	0	0	4	45	96.1 %
(-)	46	8	2	0	100 %
Total	46	8	6	45	98.1 %

Amphetamine (GC/MS specifications are the value of amphetamine): In this study, one hundred and three (103) negative and positive urine samples (0 to 46922 ng/ml) were tested and compared with GC/MS. The concentrations of two discrepant specimens were confirmed with GC/MS to be close to the cutoff value (1064 and 1117 ng/ml). The results are summarized below:

Positive Agreement: 95.8% and Negative Agreement: 100%

	(-)		(+)
Drug Screen	GC/MS Negative (0 ng/ml to 75%)	Near cutoff negative (75%- cutoff)	Near cutoff positive (cutoff to 125%)	GC/MS Positive (> 125%)	% Agreement with GC/MS
(+)	0	0	5	41	95.8 %
(-)	48	7	2	0	100 %
Total	48	7	7	41	98.1 %

Barbiturates (GC/MS specifications are the value of Secobarbital or phenobarbital): In this study, ninety-eight (98) negative and positive urine samples (0 to 6941 ng/ml) were tested and compared with GC/MS. The concentrations of two discrepant specimens were confirmed with GC/MS to be close to the cutoff value (282 and 304 ng/ml). The results are summarized below:

Positive Agreement: 97.8% and Negative Agreement: 98.1%

	(-)		(+)
Drug Screen	GC/MS Negative (0 ng/ml to 75%)	Near cutoff negative (75%- cutoff)	Near cutoff positive (cutoff to 125%)	GC/MS Positive (> 125%)	% Agreement with GC/MS
(+)	0	1	3	42	97.8 %
(-)	45	6	1	0	98.1 %
Total	45	7	4	42	98.0 %

Benzodiazepines (GC/MS specifications are the value of Oxazepam, nordiazepam, or alprazolam): In this study, ninety-nine (99) negative and positive urine samples (0 to >10000 ng/ml) were tested and compared with GC/MS. The six discrepant specimens were confirmed with GC/MS, the concentrations are Oxazepam - 292 and 319 ng/ml, and Alprazolam – 315, 317, 367 and 488 ng/ml. The results are summarized below:Positive Agreement: 95.3% and Negative Agreement: 92.9 %

	(-)		(+)
Drug Screen	GC/MS Negative (0 ng/ml to 75%)	Near cutoff negative (75%- cutoff)	Near cutoff positive (cutoff to 125%)	GC/MS Positive (> 125%)	% Agreement with GC/MS
(+)	3	1	5	36	95.3 %
(-)	47	5	2	0	92.9 %
Total	50	6	7	36	93.9 %