Table 2.

Unadjusted and adjusted Zero-inflated Poisson multivariate model predicting naloxone reversal count among participants obtaining refill (N = 962)

	Unadjusted			Adjusted
Variables	IRR	95% CI	P-value	aIRR	95% CI	P-value
Gender
Man	1 (ref)	-	-	1 (ref)	-	-
Woman	1.08	0.88, 1.33	0.45	1.08	0.87, 1.33	0.33
Age at inclusion
Mean	1.0	0.99, 1.01	0.79	1.0	0.99, 1.01	0.61
Country of birth
Sweden	1 (ref)	-	-	1 (ref)	-	-
Rest of Europe	0.89	0.69, 1.15	0.37	0.94	0.72, 1.23	0.63
Rest of the World	1.26	0.99, 1.61	0.06	1.37	1.06, 1.76	0.02
Housing situation
Stable	1 (ref)	-		1 (ref)	-
Unstable	1.1	0.91, 1.33	0.32	1.1	0.89, 1.34	0.38
Homeless	1.34	1.05, 1.72	0.02	1.35	1.06, 1.73	0.02
Other	0.84	0.60, 1.18	0.32	0.89	0.64, 1.24	0.48
Primary drug
Opioids	1 (ref)	-		1(ref)	-
Stimulants	1.14	0.92, 1.42	0.24	1.26	1.01, 1.58	0.04
Benzodiazepines	1.46	0.89, 2.42	0.14	1.75	1.1, 2.78	0.03
Other	1.12	0.54, 2.35	0.76	1.38	0.72, 2.68	0.33
Ever experienced personal overdose (baseline)
No	1 (ref)	-		1(ref)	-
Yes	1.14	0.93, 1.39	0.2	1.19	0.97, 1.47	0.10
Ever witnessed overdose (baseline)
No	1 (ref)			1(ref)
Yes	1.3	1.00, 1.69	< 0.05	1.27	0.95, 1.71	0.10

IRR Incidence Rate Ratio, CI Confidence Interval