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Table 1 Baseline Characteristics of Patients with Gallbladder Carcinoma from the SEER and Multicenter Database

From: Modification of the 8th American Joint Committee on Cancer staging system for gallbladder carcinoma to improve prognostic precision

Variables

Frequency (%)

SEER (2779)

Multicenter (591)

Age

 < 65

1130 (40.7%)

314 (53.1%)

 ≥ 65

1649 (59.4%)

277 (46.9%)

Sex

 Male

835 (30.0%)

209 (35.4%)

 Female

1944 (70.0%)

382 (64.6%)

Race

 White

2100 (75.6%)

0

 Black

348 (12.5%)

0

 Others

331 (11.9%)

591 (100%)

Vital Status

 Dead

1724 (62.0%)

436 (73.8%)

 Alive

1055 (38%)

155 (26.2%)

Grade

 Well/moderate

1525 (54.9%)

360 (60.9%)

 Poor/undifferentiated

1038 (37.3%)

231 (39.1%)

 Unknown

216 (7.8%)

0

T category(8th)

 T1

377 (13.6%)

91 (15.4%)

 T2

1187 (42.7%)

264 (44.7%)

 T3

1083 (39.0%)

210 (35.5%)

 T4

132 (4.7%)

26 (4.4%)

N category(8th)

 N0

1381 (49.7%)

337 (57.0%)

 N1

1258 (45.3%)

219 (37.1%)

 N2

140 (5.0%)

35 (5.9%)

 Median (range)

1 (0–22)

2 (0–9)

No. of LN evaluationa

 < 6

2130 (78.8%)

413 (69.9%)

 ≥ 6

573 (21.2%)

178 (30.1%)

 Median (range)

2 (1–40)

2 (1–24)

M category(8th)

 M0

2290 (82.4%)

483 (81.7%)

 M1

489 (17.6%)

108 (18.3%)

TNM Stage(8th)

 I

298 (10.7%)

57 (9.6%)

 II

592 (21.3%)

149 (25.2%)

 IIIA

326 (11.7%)

62 (10.5%)

 IIIB

897 (32.3%)

174 (29.4%)

 IVA

80 (2.9%)

18 (3.0%)

 IVB

586 (21.1%)

132 (22.3%)

Chemotherapy

 Yes

1183 (42.6%)

317 (53.6%)

 No/unknown

1596 (57.4%)

274 (46.4%)

Radiotherapy

 Yes

723 (26.0%)

184 (31.1%)

 No

2056 (74.0%)

407 (68.9%)

  1. a76 cases missing in the SEER database