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Table 1 Basic characteristics of the enrolled studies

From: Laparoscopy versus open appendectomy for elderly patients, a meta-analysis and systematic review

  Year Country Design of study No. of patients in LA group No. of patients in OA group Primary outcomes
Guller 2004 USA Retrospective 1475 8001 LOS, Postoperative complications
Harrell 2006 USA Retrospective 534 2188 LOS, Postoperative complications
Wang 2006 Taiwan, China Retrospective 24 29 Duration of surgery, LOS
Paranjape 2007 USA Retrospective 68 48 Duration of surgery, LOS, Complications
Kim 2011 USA Retrospective 2235 1100 LOS, complications
Wu 2011 Taiwan, China Retrospective 7.86 0.06 Duration of surgery, LOS, Complications
Masoomi 2012 USA Retrospective 34,066 31,397 LOS, Complications
Farrerese 2013 Italy Retrospective 19 20 Duration of surgery, LOS, Complications
Moazzez 2012 USA Retrospective 2644 1030 Duration of surgery, LOS, Complications
Ward 2016 USA Retrospective 87,209 170,276 Duration of surgery, LOS, Complications
Wu 2017 China Retrospective 56 59 Duration of surgery, LOS, Complications
Yang 2017 China Retrospective 80 65 Duration of surgery, LOS, Complications
  1. abbreviation: LOS length of hospital stay