Table 1 Association of drug check results and intentions for dose reduction or drug disposal of Insite clients who used a fentanyl drug checking service in Vancouver, Canada

Drug check result^a

Total

Dose reduction

Yes; n (%)^b

Dose reduction

No; n (%)

Odds ratio

(95% CI)

P value^c

 Positive

391

142 (36.32)

249 (63.68)

9.36 (4.25–20.65)

0.0001

 Negative

122

7 (5.74)

115 (94.26)

Ref.

Drug check result^a

Total

Drug disposal

Yes; n (%)

Drug disposal

No; n (%)

Odds ratio

(95% CI)

P value^c

 Positive

436

50 (11.47)

386 (88.53)

1.60 (0.79–3.26)

0.186

 Negative

134

10 (7.46)

124 (92.54)

Ref.