Table 3.

Randox DOA-V Biochip Immunoassay synthetic cathinone presumptive positive results for 20,017 screened urine specimens, and presumptive positive rates of synthetic cathinones (N=106). Presumptive positive urine specimens (N=97) confirmed by liquid chromatography high resolution tandem mass spectrometry (LC-HRMS).

	Total # of Specimens (N=20,017)	Randox Presumptive Positive Rate	SC Presumptive Positive Rate	Total # of Confirmed Specimens (N=97)*	Positivity Rate (%)**
Total Presumptive Positive Specimens for Synthetic Cathinones	106	0.53%	N/A	4	4.1%
Presumptive Positive Specimens for BSI only	66	0.33%	62.3%	2	3.3%
Presumptive Positive Specimens for BSII only	31	0.15%	29.2%	1	3.6%
Total Presumptive Positive Specimens for BSI and BSII	9	0.04%	8.5%	1	11.1%

^*9 presumptive positive specimens were not available for confirmation

^**Positivity Rate (%) = 100 × (number of positive by LC-HRMS/ number of positive by Randox)

Abbreviations: SC (synthetic cathinones)