Feasibility study of using mobile phone-based experience sampling to assess drug checking by opioid street drug users

Table 1 Comparison of test strip use and overdose risk reduction behaviors by survey method

	Follow-up (N = 11)		Daily reports (N = 11)
	N	%/Mean (SD)	N	%/Mean (SD)
Fentanyl test strip ratings
Ease of use	10	7.2 (2.3)	11	8.5 (1.5)
Ease of interpretability	10	8.9 (1.8)	11	8.4 (1.7)
Used fentanyl test strip past month
Yes	10	90.9%	11	100.0%
Number of times fentanyl test strip used		NE	11	7.6 (4.8)
Percent of time fentanyl test strip used
< 25%	3	30.0%	2	18.2%
> 25% < 50%	4	40.0%	4	36.4%
50% < 100%	3	30.0%	1	9.1%
100%	0	0.0%	4	36.4%
Overdose risk reduction behaviors
Took a small test dose first	3	27.3%	5	45.5%
Used only with someone else present	2	18.2%	6	54.6%
Used smaller amount or more slowly than usual	5	45.5%	5	45.5%
Had naloxone available	2	18.2%	7	63.6%
Any of the above	5	45.5%	9	81.8%
Overdoses in the past month	3	27.3%	3	27.3%

Note: Figures shown are based on the 11 participants who provided both follow-up and daily experience sampling reports. Sampling report data are summarized across the 187 reports received. Fentanyl test strip ratings are based on a scale from 1 to 10 with higher scores indicating greater ease of use and interpretability. Percent of time fentanyl test strip used for the daily reports is based on the number of days drug use was reported where the drug used that day had not been previously tested and testing was done. Percent overdose risk reduction behaviors for the daily reports are based on at least one daily report indicating a specific behavior occurred following drug testing
NE, not estimated

ISSN: 2055-5784