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Table 1 Characteristics of included studies

From: Factors associated with frequent use of emergency-department services in a geriatric population: a systematic review

References Authors Year of Publication Country Study Design Population Sample Size Data source Definition of Frequent ED use
[27] Franchi et al. 2016 Italy NM Observational Community-dwelling subjects aged 65 years or older managed by general practitioners 1,949,020 Administrative database 4 or more ED visits within a year
[23] Lishner et al. 2000 USA Retrospective study Washington State residents aged 65 years or older who were Medicare beneficiaries in 1994 and did not belong to a capitated health plan 354,782 Administrative database Patients with 5 or more ED outpatient visits
[20] McCusker et al. 2000 Canada Cohort study Patients aged 65 years or older who visited the EDs in one of Montreal’s four hospitals. 1122 Administrative database 1) 3 or more episodes of ED care during a 6-month period
[21] McCusker et al. 1997 Canada Cohort study Patients aged 75 or older who visited an ED in a Montreal hospital and those whose first visit was during the index period, and who were aged 65 or older Assessment sample113 Retrospective survey 4466 Questionnaire Administrative database Repeat visits within 90 days
[26] Naughton et al. 2010 Ireland NM Observational Elderly patients from EDs at Dublin’s two teaching hospitals 306 Questionnaire One or more ED visits within a 6-month period
[25] Parboosing et al. 1987 Canada Cross-sectional Elderly patients of the ED of a Calgary hospital 75 Questionnaire Number of ED visits within a 6-month period
[24] Rosenblatt et al. 2000 USA Retrospective study Washington State residents aged 65 years or older who were Medicare beneficiaries and did not belong to a capitated healthcare plan 354,782 Administrative database 5 or more outpatient ED visits within a 12-month period
[22] Sona et al. 2012 Italy Prospective study Patients aged 65 years or older from an ED in a Turin hospital 1632 Questionnaire 2 or more ED visits within a 12-month period