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Table 3 Baseline demographic and tumor characteristics of patients based on tumor size

From: Development and external validation of a nomogram for predicting the effect of tumor size on survival of patients with perihilar cholangiocarcinoma

Characteristic Tumor size   
1–19 mm 20-33 mm ≥34 mm Log-rank P value
Age < 60 26 (29.5) 48 (30.0) 32 (27.8) 0.16 0.923
≥60 62 (70.5) 112 (70.0) 83 (72.2)   
Race White 63 (71.6) 123 (76.9) 79 (68.7) 0.401 4.035
Black 5 (5.7) 9 (5.6) 12 (10.4)   
Others 20 (22.7) 28 (17.5) 24 (20.9)   
Sex Female 29 (33.0) 56 (35.0) 51 (44.3) 3.504 0.173
Male 59 (67.0) 104 (65.0) 64 (55.7)   
Grade Well/moderate 53 (60.2) 102 (63.8) 62 (53.9) 10.169 0.038
Poor/undifferentiated 18 (20.5) 45 (28.) 39 (33.9)   
Unknown 17 (19.3) 13 (8.1) 14 (12.2)   
T5 T1 24 (27.3) 20 (12.5) 11 (9.6) 28.336 < 0.001
T2 37 (42.0) 80 (50.0) 58 (50.4)   
T3 10 (11.4) 21 (13.1) 19 (16.5)   
T4 2 (2.3) 7 (4.4) 15 (13.0)   
Tx 15 (17.0) 32 (20.0) 12 (10.4)   
M M0 85 (96.6) 153 (95.6) 107 (93.0) 1.538 0.463
M1 3 (3.4) 7 (4.4) 8 (7.0)   
RN status RN examined and not positive 52 (59.1) 76 (47.5) 41 (35.7) 15.744 0.015
RN examined and < 4 nodes positive 21 (23.9) 53 (33.1) 40 (34.8)   
RN examined and > =4 nodes positive 3 (3.4) 15 (9.4) 16 (13.9)   
RN not examined or RN unknown 12 (13.6) 16 (10.0) 18 (15.7)   
Vascular Invasion Absent 83 (94.3) 141 (88.1) 91 (79.1) 10.475 0.005
Present 5 (5.7) 19 (11.9) 24 (20.9)