Primary care utilization in people who experience imprisonment in Ontario, Canada: a retrospective cohort study

Table 3 Proportion of persons released from provincial prison in 2010 and age- and sex-matched general population controls in Ontario, Canada with any primary care utilization, by period relative to time in prison^a

Period relative to time in prison*	Prison release group		General population controls		p value‡
Period relative to time in prison*	N	Any use (%)	N	Any use (%)	p value‡
In prison^b	48,861	40.8%	195,444	14.0%	<0.001
0-6 days post-release	48,861	13.4%	195,444	4.4%	<0.001
7-29 days post-release	47,870	19.5%	195,393	12.0%	<0.001
30-89 days post-release	44,939	28.5%	195,231	24.2%	<0.001
90-179 days post-release	39,328	33.3%	194,794	31.7%	<0.001
180-364 days post-release	33,538	43.9%	194,158	47.3%	<0.001
365-730 days post-release	26,055	58.3%	193,040	61.8%	<0.001

^aOr the corresponding period for general population controls. Note that the period lengths vary, which limits the ability to compare the percent with any use between time periods. ^bThe median length of time in prison was 10 days (interquartile range 3 to 52 days). ‡From chi squared test of the proportion with any use in the prison release group compared to general population controls

ISSN: 1472-6963