Table 4.

Samples discarded according to clients’ belief of what the sample was in relation to colorimetric test result

Match status*	Discarded on site	Total (%)
Matched	13	1891 (0.69)**
Not matched	8	155 (5.16)**
Unknown-belief	8	130 (6.15)**
Unknown-colorimetric result	23	148 (15.54)**
Unknown-Unknown	8	26 (30.77)
Other	5	37 (13.51)
Total	65	2387 (100.00)

*Match status refers to whether clients’ expectation of what the substance was, matched the colorimetric drug checking result

**Fisher’s exact test between (match and not-match), (match and unknown result), and (match and unknown belief/result) resulted in p value < 0.001