Table 1.

Prevalence rate ratio of trends in prescribed methadone, buprenorphine/naloxone or either in Ontario, Canada, 2015–2018

	Provincial prison population*				Whole population				Are PRRs different?
	PRR	95% CI		P value for trend	PRR	95% CI		P value for trend
Methadone	1.01	0.94	1.09	0.77	0.99	0.99	0.999	0.034	p=0.078
Buprenorphine/naloxone	1.70	1.47	1.96	0.000	1.20	1.19	1.21	0.000	p<0.001
Any OAT	1.12	1.04	1.21	0.003	1.04	1.04	1.04	0.000	p<0.001

*26 provincial prisons in Ontario.

OAT, opioid agonist treatment; PRR, prevalence rate ratio.