The choice of dissection or preservation of the inferior pulmonary ligament after an upper lobectomy: a systematic review and meta-analysis

Table 1 The basic characteristic of included studies

Study	Country	Study design	Number of patients	Group		Location		NOS score (star rating)
Study	Country	Study design	Number of patients	D	P	Left	Right	NOS score (star rating)
Bu L. [6]	China	CCT	72	33	39	27	45	******
Guo H [9].	China	CCT	69	36	33	None	69	*****
Ji LL [10].	China	CCT	100	50	50	37	63	*****
Kim DH [11].	Korea	CCT	52	31	21	None	52	*******
Matsuoka, H [12].	Japan	RCT	35	17	18	12	23	_
Qi HF [13].	China	RCT	100	50	50	None	100	_
Seok Y [7].	Korea	CCT	72	43	29	34	38	******
Wang WH [14].	China	RCT	110	55	55	56	54	_

Abbreviation: CCT clinically controlled trial, RCT randomized controlled trial, D dissection, P preservation, NOS Newcastle-Ottawa scale
*: star

ISSN: 1477-7819