1. Video-Assisted Thoracoscopic Surgery Versus Thoracotomy Lymph Node Dissection in Clinical Stage I Lung Cancer: A Meta-Analysis and System Review 
Wenxiong Zhang, MD, Yiping Wei, MD, Han Jiang, MM, Jianjun Xu, MM, Dongliang Yu, MM 
The Annals of Thoracic Surgery 
Volume 101, Issue 6, Pages (June 2016)
DOI: /j.athoracsur
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

2. Fig 1
Flow diagram of screened and included papers. (LNN = lymph node number; LNS = lymph node station number; SD = standard deviation; VATS = video-assisted thoracoscopic surgery.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

3. Fig 2
Forest plot of the mean difference in (A) total lymph node number and (B) lymph node station number in the video-assisted thoracoscopic surgery (VATS) group vs the thoracotomy (Open) group. The horizontal lines represent the 95% confidence interval (CI). The solid squares indicate the mean difference and are proportional to the weights used in the meta-analysis. The solid vertical line indicates no effect. The diamond indicates the weighted mean difference and the lateral tips of the diamond indicate the associated 95% CI. (IV = inverse variance; SD = standard deviation.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

4. Fig 3
Forest plot of the mean difference in (A) N2 lymph node number and (B) lymph node station number in the video-assisted thoracoscopic surgery (VATS) group vs the thoracotomy (Open) group. The horizontal lines represent the 95% confidence interval (CI). The solid squares indicate the mean difference and are proportional to the weights used in the meta-analysis. The solid vertical line indicates no effect. The diamond indicates the weighted mean difference and the lateral tips of the diamond indicate the associated 95% CI. (IV = inverse variance; SD = standard deviation.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

5. Fig 4
Forest plot of the mean difference in N1 lymph node number in the video-assisted thoracoscopic surgery (VATS) group vs the thoracotomy (Open) group. The horizontal lines represent the 95% confidence interval (CI). The solid squares indicate the mean difference and are proportional to the weights used in the meta-analysis. The solid vertical line indicates no effect. The diamond indicates the weighted mean difference and the lateral tips of the diamond indicate the associated 95% CI. (IV = inverse variance; SD = standard deviation.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

6. Fig 5
Forest plot of the mean difference in (A) left-side and (B) right-side lymph node number in the video-assisted thoracoscopic surgery (VATS) group vs the thoracotomy (Open) group. The horizontal lines represent the 95% confidence interval (CI). The solid squares indicate the mean difference and are proportional to the weights used in the meta-analysis. The solid vertical line indicates no effect. The diamond indicates the weighted mean difference and the lateral tips of the diamond indicate the associated 95% CI. (IV = inverse variance; SD = standard deviation.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions

7. Fig 6
Funnel plot of the mean difference (MD) in total lymph node number in the video-assisted thoracoscopic surgery group versus the thoracotomy group. (SE = standard error.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2016 The Society of Thoracic Surgeons Terms and Conditions