Table 4.

Constructed prognostic score to predict cancer-specific survival in stage IB NSCLC patients.

Covarite	β [HR = exp (β)]	Score
Gender	−0.356	−0.356 * (1/2; male = 1, female = 2)
Age	0.039	0.039 * Age at diagnosis
Nodes examined	−0.026	−0.026 * number of nodes examined
Grade	0.403	0.403* (1/2/3/4; Grade I = 1, Grade II = 2, Grade III = 3, Grade IV = 4)
Pleura invasion	0.378	0.378 * (0/1; no = 0, yes = 1)
		Total computed score *100
Risk stratification
Low risk		≤ 291.5
High risk		>291.5

NSCLCL, non-small cell lung cancer.