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. 2021 Apr;10(4):1773–1786. doi: 10.21037/tcr-20-3411

Table 1. Clinical and pathological features of the training and validation groups.

Variable SEER training group CICAMS validation group
Number of patients 441 39
Sex
   Male 284 (64.40%) 37 (94.87%)
   Female 157 (35.60%) 2 (5.13%)
Age, median (Q1–Q3) 32.00 (21.00–38.00) 35.00 (31.50–39.00)
Racea
   White 265 (60.09%)
   Black 50 (11.34%)
   Other 122 (27.66%) 39 (100.00%)
   Unknown 4 (0.91%)
Insurance recode
   Insured and any Medicaid 288 (65.31%) 35 (89.74%)
   Uninsured 8 (1.81%) 4 (10.26%)
   Unknown 145 (32.88%) 0 (0.00%)
Marital status
   Unmarried 169 (38.32%) 14 (35.90%)
   Married 260 (58.96%) 25 (64.10%)
   Unknownb 12 (2.72%) 0 (0.0%)
Grade
   Grades I+II 111 (25.17%) 10 (25.64%)
   Grades III+IV 252 (57.14%) 15 (38.46%)
   Unknown 111 (25.17%) 14 (35.89%)
AJCC stage 7th
   I 190 (43.08%) 30 (76.9%)
   II 93 (21.09%) 3 (7.6%)
   III 74 (16.78%) 5 (12.8%)
   IV 62 (14.06%) 0 (0.00%)
   Unknown 22 (4.99%) 1 (2.5%)
T stage
   T1 210 (47.62%) 30 (76.92%)
   T2 106 (24.04%) 3 (7.69%)
   T3 89 (20.18%) 5 (12.82%)
   T4 21 (4.76%) 0 (0.00%)
   Tx 15 (3.40%) 1 (2.56%)
N stage
   N0 388 (87.98%) 39 (100.00%)
   N1 40 (9.07%) 0 (0.00%)
   Nx 13 (2.95%) 0 (0.00%)
M stage
   M0 402 (91.16%) 39 (100.00%)
   M1 35 (7.94%) 0 (0.00%)
   Mx 4 (0.91%) 0 (0.00%)
BCLC
   0 3 (7.6%)
   A 25 (64.1%)
   B 11 (28.2%)
   C 0 (0.00%)
Surgery to the liver-detail
   Local tumor destruction 32 (7.26%) 0 (0.00%)
   Wedge or segmental resection 132 (29.93%) 26 (66.6%)
   Lobectomy 128 (29.02%) 4 (10.2%)
   Extended lobectomy 34 (7.71%) 26 (66.6%)
   Hepatectomy, NOS 107 (24.26%) 2 (5.1%)
   Surgery, NOS 8 (1.82%) 7 (17.9%)
Surgery to LN
   No 302 (68.48%) 35 (89.7%)
   Yes 136 (30.84%) 4 (10.2%)
   Unknown 3 (0.68%) 0 (0%)
AFP
   Positive/elevated 196 (44.44%) 25 (64.1%)
   Negative/normal 144 (32.65%) 13 (33.3%)
   Unknown 101 (22.90%) 1 (2.5%)
Fibrosis score
   0–4 71 (16.10%) 13 (34.21%)
   5–6 43 (9.75%) 15 (39.47%)
   Unknown 327 (74.15%) 10 (26.32%)
Tumor size group (mm)
   0–20 55 (12.47%) 1 (2.56%)
   21–50 114 (25.85%) 21 (53.85%)
   51–100 109 (24.72%) 10 (25.64%)
   ≥101 140 (31.75%) 6 (15.38%)
   Unknown 23 (5.22%) 1 (2.56%)
Overall survival
   Alive 266 (60.32%) 32 (82.05%)
   Dead 175 (39.68%) 7 (17.95%)
Cancer-specific survival
   Alive 266 (60.32%) 32 (82.05%)
   Death due to cancer 155 (35.15%) 7 (17.95%)
   Death due to other reasons 20 (4.54%) 0 (0.00%)
   Survival months, median (Q1–Q3) 41.00 (17.00–86.00) 52.00 (29.00–65.00)

a, includes American Indian/AK Native, Asian/Pacific Islander; b, divorced/separated/single (never married)/unmarried or domestic partner/widowed.