From: Association between number of dissected lymph nodes and survival in patients undergoing resection for clinical stage IA pure solid lung adenocarcinoma: a retrospective analysis
Model
Recurrence-free survival
HR (95%CI)
P value a
One-line (non-segmented)
0.98 (0.95, 1.01)
0.236
Segmented regression
Fewer than 9 nodes
0.77 (0.67, 0.87)
< 0.001
At least 9 nodes
1.01 (0.97, 1.04)
0.653
P in log-likelihood ratio test
0.001