Nomogram to predict overall survival after gallbladder cancer resection in China

Table 1 Descriptive statistics for time to event variable

Total	Event n (%)	Censored n (%)	Time (mo)	Survival probability	95%CI	Quartile	Point estimate	95%CI
142	94 (66.2)	48 (33.8)	12	0.638	0.562-0.724	50%	20	14-31
			36	0.360	0.284-0.458

CI: Confidential interval.

Table 2 Patient characteristics n (%)

Feature (Min, Median, Mean, Max, SD)	No. of patients
Age (35, 64, 63.9, 83, 10.2), years
< 55	24 (16.9)
55-65	49 (34.5)
≥ 65	69 (48.6)
Gender
Male	55 (38.7)
Female	87 (61.3)
Jaundice
Absent	122 (85.9)
Present	20 (14.1)
Cholecystolithiasis
Absent	67 (47.2)
Present	75 (52.8)
Diabetes
Absent	32 (22.5)
Present	110 (77.5)
BMI (15.4, 23.5, 24.2, 32.3, 3.4)
< 24	75 (52.8)
≥ 24	67 (47.2)
CA19-9 (0.01, 13.2, 66.4, 10524, 507.7), kU/L
< 40	65 (45.8)
≥ 40	77 (54.2)
Tumor size (0.2, 3.0, 3.4, 13, 2.1), cm
< 2	38 (26.8)
2-5	68 (47.9)
≥ 5	36 (25.3)
Primary tumor
Tis	9 (6.3)
T1	9 (6.3)
T2	20 (14.1)
T3	93 (65.5)
T4	11 (7.8)
Regional lymph node
N0	86 (60.6)
N1	43 (30.3)
N2	13 (9.1)
Stage
0	9 (6.3)
I	9 (6.3)
IIA	10 (7.0)
IIB	3 (2.1)
IIIA	49 (34.6)
IIIB	40 (28.2)
IVA	9 (6.3)
IVB	13 (9.2)
Histologic grade
G1	27 (19.0)
G2	53 (37.3)
G3	50 (35.2)
GX	12 (8.5)
Surgical margins
R0	112 (78.9)
R1	30 (21.1)

Min: Minimum; Max: Maximum; SD: Standard deviation; No. of patients: Number of patients; BMI: Body mass index; CA19-9: Carbohydrate antigen 19-9; R: Resection.