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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Semin Thorac Cardiovasc Surg. 2020 Aug 25;33(1):206–216. doi: 10.1053/j.semtcvs.2020.08.006

Figure 2.

Figure 2.

Disease-free survival showed no significant differences both before (A) and after (B) applying the matching-weights procedure for patients with cN0-pN2a1 non-small cell lung cancer who underwent NS versus patients who underwent SF for cN2-pN2a1 disease. Cox model after the matching-weights procedure: (NS vs reference of SF) HR, 1.61 (95% CI, 0.98-2.65). For the matching-weights analyses, each patient contributes a fraction reflecting the matching-weights; therefore, the effective sample size (numbers at risk) may not be an integer. The number of patients at risk and 95% CI estimates corresponding to each time point are presented below the figure for each group. CI, confidence interval; HR, hazard ratio; NS, neoadjuvant therapy followed by surgery; SF, surgery first.