Table 3.

Count ratios and 95% confidence intervals for the association between buprenorphine/naloxone prescription given and number of all-cause repeat emergency department visits. ⁺

	Repeat ED visit within 30 days		Repeat ED visit within 90 days		Repeat ED visit within 1 year
	Crude (95% CI)	Adjusted 1 (95% CI)	Crude (95% CI)	Adjusted 1 (95% CI)	Crude (95% CI)	Adjusted 1 (95% CI)
Overall
No bup/nx	Ref	Ref	Ref	Ref	Ref	Ref
Bup/nx given	0.60 (0.35–1.02)	0.56 (0.33–0.96)	0.48 (0.29–0.79)	0.43 (0.27–0.69)	0.66 (0.42–1.05)	0.60 (0.39–0.92)
No naloxone kit given
No bup/nx	Ref	Ref	Ref	Ref	Ref	Ref
Bup/nx given	0.95 (0.13–6.97)	1.10 (0.15–8.13)	0.37 (0.03–4.88)	0.50 (0.04–5.68)	0.39 (0.03–5.66)	0.52 (0.04–6.54)
Naloxone kit given
No bup/nx	Ref	Ref	Ref	Ref	Ref	Ref
Bup/nx given	1.73 (0.52–5.78)	1.50 (0.45–5.07)	3.46 (0.75–15.97)	2.67 (0.63–11.28)	2.38 (0.76–7.44)	1.85 (0.63–5.44)

⁺ Estimates of count ratio and 95% CIs generated from Poisson models.

^* Bold face font indicates statistical significance where P < 0.05.

¹ Adjusted for age and domicile status.

ED, emergency department; CI, confidence interval; bup/nx, buprenorphine/naloxone; ref, reference.