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Table 1 Characteristic of the included studies

From: Safety of outpatient anterior cervical discectomy and fusion: a systematic review and meta-analysis

Author Year Year of onset Follow-up time Inpatient Outpatient Matched factors
Events Total Events Total
Adamson [16] 2014 2006–2013 90 days 270 274 621 629 ACDF level and other disease
Liu [18] 2009 August 2005–May 2007 62.4 days (mean) 60 64 45 45 ACDF level and operation condition
McGirt [27] 2015 2005–2011 30 days 630 650 781 792 Age, other disease, operation condition and ASA grades
Silvers [21] 1996 1.3 (outpatient) and 1.6 (inpatient) years 52 53 49 50 None
Stieber [22] 2005 1998–2002 21 days 49 56 27 30 Age
Trahan [24] 2011 November 2005–April 2009 6 h 58 58 58 59 Age
Walid [25] 2010 562 578 96 97 Age and other disease