Table 2

Mean monthly hospital admissions per HIU enrolled in SHarED across the six participating EDs

Months of follow-up	HIUs (n)	Mean monthly number of ED visits pre-enrolment and post-enrolment in SHarED						Difference in the monthly number of ED visits
		12 months baseline		Baseline equivalent to follow-up period		Follow-up		12 months baseline				Baseline equivalent to follow-up period
		Mean	SD	Mean	SD	Mean	SD	Value	95% CI	P value	Change (%)	Value	95% CI	P value	Change (%)
3	148	0.5	0.5	0.6	0.8	0.3	0.5	−0.2	−0.25 to −0.09	<0.001	−40	−0.3	−0.44 to −0.19	<0.001	−50
4	142	0.5	0.5	0.6	0.7	0.3	0.4
5	135	0.5	0.5	0.6	0.6	0.3	0.4
6	127	0.5	0.5	0.6	0.6	0.2	0.3	−0.3	−0.33 to −0.17	<0.001	−60	−0.3	−0.41 to −0.24	<0.001	−67
7	116	0.5	0.5	0.6	0.6	0.2	0.3
8	110	0.5	0.5	0.6	0.6	0.2	0.3
9	96	0.6	0.5	0.6	0.6	0.2	0.3	−0.4	−0.44 to −0.25	<0.001	−67	−0.4	−0.47 to −0.27	<0.001	−67
10	81	0.6	0.5	0.6	0.6	0.2	0.3
11	45	0.4	0.4	0.4	0.4	0.2	0.3
12	33	0.4	0.4	0.4	0.4	0.2	0.2	−0.2	−0.37 to −0.09	0.002	−50	−0.2	−0.39 to −0.09	0.002	−50

ED, emergency department; HIU, high-impact user; SHarED, Supporting High impAct useRs in Emergency Departments.