A clinical study of efficacy of polyglycolic acid patch in surgery for pneumothorax:a systematic review and meta-analysis

Table 1 Summary of the eight studies included in the present meta-analysis

Study	First	Country	Institution	Enrolled year		No. of patients		Outcomes	Design	Quality
	Author			PGA	Control	PGA	Control
2003 [9]	Minami	Japan	Single	Not mentioned	Not mentioned	19	30	①	Retrospective	6
2011 [10]	Sun	China	Single	1996.06–2009.06	2009.06–2009.06	96	43	①④⑥	RCT	4
2012 [11]	Lin	China	Single	1995.01–2010.12	1995.1–2010.12	24	32	①④⑤	Retrospective	7
2013 [12]	Lee	Korea	Single	2009.01–2011.08	2009.01–2011.08	129	128	①②③④⑤	RCT	3
2015 [6]	Hirai	Japan	Single	1994.04–2007.12	1994.04–2007.12	181	98	①	Retrospective	6
2016 [2]	Hong	Korea	Single	2011.01–2013.04	2011.01–2013.04	58	58	①③④	Retrospective	8
2017 [8]	Zhang	China	Single	2015.01–2016.06	2015.01–2016.06	60	74	①②③④⑤⑥	RCT	4
2017 [13]	Kimura	Japan	Single	2008.03–2011.11	2008.03–2011.11	32	33	①③④⑥	Retrospective	6

① Postoperative recurrence, ② Average postoperative air leakage (days), ③ Prolonged air leaks (≧3–4 days), ④ Drainage tube removal time (days), ⑤ Postoperative hospital stay (days), ⑥ Operative time (minutes) RCT:randomized controlled trials

ISSN: 1749-8090