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. Author manuscript; available in PMC: 2019 Apr 10.
Published in final edited form as: Drug Alcohol Depend. 2017 Nov 16;182:86–92. doi: 10.1016/j.drugalcdep.2017.10.011

Table 2.

Characteristics of Public Health – Seattle and King County Needle and Syringe Exchange Program (NSEP) non-MSM clients who reported injecting methamphetamine with heroin (goofballs) compared to those who reported injecting other drugs in the past three months, 2009–2017

Characteristic Injected Goofballs N=576 N (%) Injected Other Drugs N=l,559 N (%) Unadjusted Prevalence Ratio (95% CI)
Age, mean [SD] 33.7 [9.4] 39.2 [12.3] 0.7 (0.7–0.8)3
Gender
 Female 172 (29.9) 497 (31.9) Reference
 Male 404 (70.1) 1,062 (68.1) 1.1 (0.9–1.2)
White, non-Hispanic 423 (74.0) 1,102 (70.9) 1.1 (0.95–1.3)
Homeless or unstably housed 438 (76.2) 810 (52.3) 2.2 (1.9–2.7)
Injects drugs daily 449 (78.2) 970 (63.6) 1.7 (1.4–2.1)
Opioid overdose, past year1,2 166 (28.9) 201 (15.2) 1.7 (1.5–1.9)

Abbreviations: SD, standard deviation

1

Based on self-report

2

Restricted to participants reporting any opioid use in the past three months (91% of all clients)

3

Prevalence ratio is for 10 year increments