Table 2.

Variable assignment description

Variables	Serial number	Assignment
Clinical stages	X1	0 = Phase I, 1 = Phase II
Tumor diameter	X2	0 = ≤ 4 cm, 1 = > 4 cm
Cervical erosion	X3	0 = No, 1 = Yes
Depth of muscularis invasion	X4	0 = ≤ 1/2, 1 = > 1/2
Cancer thrombus	X5	0 = No, 1 = Yes
Invasion uterine	X6	0 = No, 1 = Yes
Pelvic lymph node metastasis	X7	0 = No, 1 = Yes
Preoperative SCC-Ag	X8	Continuous variable

Notes: SCC-Ag means Squamous Cell Carcinoma antigen.