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. 2022 Dec 15;19:142. doi: 10.1186/s12954-022-00720-7

Table 2.

Characteristics of FTS use among SSP clients in southern Wisconsin

Characteristics of FTS use n = 274
m (SD) or n (%)
How many times have you tested drugs with a FTS?b 26.7 (74.4)
How many times have you used drugs tested by someone else with a FTS?b 14.4 (64.9)
How often do you test your drugs when using your drug of choice?
 Neverc 12 (4.4)
 Rarely 47 (17.2)
 Some of the time 115 (42.0)
 Most of the time 64 (23.4)
 Every time 36 (13.1)
Has the test strip ever showed there was fentanyl in your drugs? Yes 261 (95.3)
Has the test strip ever showed there was no fentanyl in your drugs? Yes 194 (70.8)
Has the test strip result been confusing so you could not tell if there was fentanyl? Yes 79 (28.8)
How often do you get a positive result when you use a fentanyl test strip on your drug of choice?
 Never 9 (3.3)
 Rarely 44 (16.1)
 About half the time 88 (32.1)
 Most of the time 97 (35.4)
 All of the time 36 (13.1)
Do you usually test your drug of choice with a test strip before or after you use? After 36 (13.1)
Which of the following drugs have you tested using a fentanyl test strip?d
 Cocaine 74 (27.0)
 Crack cocaine 88 (32.1)
 Fentanyl 101 (36.9)
 Heroin 254 (92.7)
 Marijuana 13 (4.7)
 Methamphetamine 52 (19.0)
 Opioid analgesics 31 (11.3)
 Othere 7 (2.6)
 Stimulant medications like Adderall 3 (1.1)
Have you tried using a fentanyl test strip to look for a fentanyl analog in your drugs? Yes 168 (61.3)

FTS fentanyl test strip, SSP syringe service program, m mean, SD standard deviation

aThe sample includes respondents who reported using drugs tested by themselves or by others with FTS

bThree respondents who used drugs tested with FTS skipped these questions

cThe twelve individuals (4.4%) who reported never using FTS to test their drug of choice were mostly comprised of individuals who had only used drugs tested by someone else (n = 10), one individual who used FTS on drugs other than their drug of choice, and one individual who likely answered this question incorrectly (given that they reported testing their drug of choice in a different question)

dRespondents were able to select multiple drugs. All respondents who used drugs tested with FTS checked at least one option

eOther drugs were pressed Xanax (n = 2), MDMA (n = 2), pressed pills such as Xanax and Percocet (n = 1), urine (n = 1), and “speedball,” heroin mixed with cocaine (n = 1)