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Table 1 Basic characteristics and demographics of the included studies

From: Uniportal versus multiportal video-assisted thoracoscopic anatomical resection for NSCLC: a meta-analysis

First Author Country Year of Publication Study year Retrospective/ Prospective Study Type Patients Lobe Seg TNM8th Stage NOS score
Al-Ameri [17] Sweden 2019 2016–2018 Retrospective No 333 122/211 0/0 Stage I-IV 7
Bourdages-Pageau [15] Canada 2019 2014–2017 Retrospective PSM 722 247/247 0/0 T1N0M0 8
Chang [19] China Taiwan 2016 2012–2014 Retrospective No 121 26/55 3/2 T1-2N0M0 7
Chung [7] South Korea 2015 2013–2014 Retrospective No 150 90/60 0/0 T1-2N0M0 7
Dai [20] China 2016 2013–2015 Retrospective PSM 143 63/63 0/0 T1-3N2M0 7
French [21] Canada 2016 2014–2015 Retrospective PSM 100 40/42 10/8 T1N0M0 7
Han [22] South Korea 2016 2006–2015 Retrospective No 439 167/212 0/0/ Stage I or II 7
Heo [23] South Korea 2017 2012–2015 Retrospective PSM 104 32/32 0/0 T1-2N0-2M0 7
Hirai [24] Japan 2019 2012–2019 Prospective No 212 142/70 0/0 T1N0M0 7
Li [25] China 2019 2015–2017 Retrospective PSM 492 215/232 31/14 NG 8
Lin [14] China 2016 2013–2014 Retrospective No 67 21/46 0/0 NG 7
Liu [9] China Taiwan 2016 2005–2014 Retrospective No 442 100/342 49/47 NG 7
Liu [26] China 2019 2015–2016 Prospective No 328 166/162 0/0 T1N0M0 8
McElnay [8] UK 2014 2012–2013 Retrospective No 110 15/95 0/0 NG 7
Mu [16] China 2015 2014–2015 Prospective PSM 405 28/21 8/8 Stage I-III 8
Perna [27] Spain 2016 2015–2016 Prospective RCT 131 51/55 0/0 T1-2N0M0 8
Shen [28] China 2016 2013–2014 Retrospective PSM 396 100/100 0/0 T1-3N0M0 7
Song [29] South Korea 2017 2011–2016 Retrospective PSM 73 26/26 0/0 Stage I-III 7
Zhao [30] China 2019 2013–2015 Retrospective No 129 73/56 0/0 Stage I 7
Zhu [31] China 2015 2014 Aug-2014 Oct Retrospective No 82 33/49 0/0 Stage I or II 7
  1. NOS score Score of Newcastle Ottawa Scale, RCT randomized controlled trial, PSM propensity matched, Lobe Lobectomy, NG Not given, Seg Segmentectomy, TNM8th 8th edition of TNM classification of lung cancer