Table 1.

Health information exchange (HIE) access rates according to number and type of visits to exchange sites

	Visits, n (%)	Exchange accessed, n (%)
First visit to any exchange site (ie, no record in HIE)	289 356 (25)	7256 (2.5)
Visits only to this exchange site (ie, all data in HIE come from this site)	291 330 (25)	8597 (3.0)
First visit to this exchange site but more than one previous visit to other exchange sites (ie, all data in HIE come from another exchange site)	162 605 (14)	11 478 (7.1)
More than one visit to this site, and a history of more than one visit to other exchange site(s)	404 706 (36)	29 668 (7.3)