Table 2.

Answers to the questions posed to users about the consumption of the substance before submission of the sample for the colorimetric test and users' intention to use the tested substance after receiving the colorimetric test result.

Intention to use the substance after the test	Substance used before the test
	No	Yes	Total
NO	12	9	21
	57.14%	42.86%	100%
	23.08%	13.24%	17.50%
YES	40	59	99
	40.40%	56.67%	100%
	76.92%	92.42%	82.50%
Total	52	68	120
	43.33%	56.67%	100%
	100%	100%	100%

Pearson chi2 (1) = 1.9768; Pr = 0.160.