A Prediction Rule for Overall Survival in Non-Small-Cell Lung Cancer Patients with a Pathological Tumor Size Less Than 30 mm

Table 3

Point assignment, prognostic scores, and estimated 5-year overall survival based on pathological tumor size, lymph node metastasis, and Ki-67 expression.

Variable	Prognostic score	Estimated 5-year overall survival (%)
Pathological tumor size (mm)
≤10 mm	10
10-20 mm	5
>20-30 mm	0
Lymph node metastasis
N0	4.72
N1	2.36
N2	0
Ki-67 protein expression
<10%	7.95
≥10%	0
Total prognostic score (IQR)
0-9.72		57.8
9.72-17.67		85.3
7.67-22.67		97.2
≥22.67		100

IQR: interquartile range.