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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: Ann Thorac Surg. 2017 Jul 29;104(4):1221–1230. doi: 10.1016/j.athoracsur.2017.05.011

Table 4.

Outcomes among patients with pathological node-negative disease, following 4:1 propensity matching, NCDB 2006–2011

Variable Overall Adjuvant chemo (n = 15) Surgery alone (n = 60) P-value
Nodes examined (median, IQR) 7 (4, 13) 8 (2.5, 19.5) 6.5 (4, 13) 0.72
Margins 0.99
 R0 74 (98.7%) 15 (100%) 59 (98.3%)
 R1 0 (0%) 0 (0%) 0 (0%)
 R2 1 (1.3%) 0 (0%) 1 (1.7%)
30-day readmission 4 (5.5%) 0 (0%) 4 (6.8%) 0.99
30-day mortality 0 (0%) 0 (0%) 0 (0%) 0.99
90-day mortality 2 (2.7%) 1 (6.7%) 1 (1.7%) 0.87
Hospital LOS (IQR) 6 (4, 7) 6 (4.2, 12.8) 5 (4, 6.5) 0.13

Percentages have been rounded and may not add up to 100 %

NCDB National Cancer Data Base

LOS Length of stay, IQR Interquartile Range