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Table 2 Scale and utilization of shared electronic health records (SEHR) in unscheduled care (HMO = health maintenance organization; ED = Emergency Department)

From: The role and benefits of accessing primary care patient records during unscheduled care: a systematic review

Setting Population Size Patients with a record Patients opted-out % (n) General Practices connected to SEHR % (n) SEHR access
England [5,6,7,8,9, 38] 51 million 80% 1.4% (714,000) Not Reported 3.2 accesses per GP per month (82,000 total)
Scotland [5, 26] 5.1 million 99% 0.03% (2000) 100% (970) 46 accesses per GP per month (230,000 total)
Wales [5] 3 million 65% Not Reported 65% (290) Not Reported
Northern Ireland [5] 1.8 million 99% Not Reported 100% (354) Not Reported
United States of America
 Integrated Care Collaboration of Central Texas [35] Not Reported 6393 patients included in the study 1.5% (96) Two urban community health centers – both participated 21% of all encounters
 The Midsouth eHealth Alliance of Memphis Tennessee representing 12 major hospitals [33] 1.7 million patients 1.7 million 1–3% (study conducted across multiple sites) Not Reported 6.8% of ED encounters
 New York-Presbyterian Hospital/
 Columbia University Medical Center [40]
2.5 million patients 2.5 million Nil Not Reported 20–50%
 Indiana Network for Primary Care [19] Not Reported 10.2 million records Not Reported Not Reported 26% of all ED contacts
 HealtheLink the regional health information exchange of Western New York [27] Not Reported 737 patients studied 5.3% (39 patients) Not Reported 100% of records were accessed for patients in the study cohort
 Rochester New York area [43] 1.14 million 800,000 Nil Not Reported 14.21% of ED visits
 Holland (Twente region) [20, 21] 620,000 49% 51% of people did not opt in 95% Not Reported
 Israel (HMOs) [22,23,24,25] 3.8 million 100% Not Reported 100% 23.7% of all ED encounters