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Table 1 Baseline characteristics of UHFLM, UTCLM and USFLM patients

From: Primary tumor resection improves prognosis of unresectable carcinomas of the transverse colon including flexures with liver metastasis: a preliminary population-based analysis

Variables Total UHFLM UTCLM USFLM
1960 556 1008 396
Age
 ≤64 920 249(44.8) 458(45.4) 213(53.8)
 65–76 567 167(30.0) 301(29.9) 99(25.0)
 ≥77 473 140(25.2) 249(24.7) 84(21.2)
Gender
 Female 882 242(43.5) 458(45.4) 182(46.0)
 Male 1078 314(56.5) 550(54.6) 214(54.0)
Race
 White 1416 406(73.0) 729(72.3) 281(71.0)
 Black 376 100(18.0) 200(19.8) 76(19.2)
 Other 168 50(9.0) 79(7.8) 39(9.8)
Year of diagnosis
 2010–2011 631 183(32.9) 311(30.9) 137(34.6)
 2012–2013 650 176(31.7) 345(34.2) 129(32.6)
 2014–2015 679 197(35.4) 352(34.9) 130(32.8)
Marital status
 Unmarried 968 265(477) 516(51.2) 187(47.2)
 Married 992 291(523) 492(48.8) 209(52.8)
MHI (in tens)
 1926–5768 767 209(37.6) 402(39.9) 156(39.4)
 5769–7177 650 196(35.3) 325(32.2) 129(32.6)
 7178–11,097 543 151(27.2) 281(27.9) 111(28.0)
Grade
 I + II 1049 272(48.9) 551(54.7) 226(57.1)
 III + IV 492 151(27.2) 253(25.1) 88(22.2)
 Unknown 419 133(23.9) 204(20.2) 82(20.7)
T stage
 T1 + T2 + T3 866 212(38.1) 479(47.5) 175(44.2)
 T4 554 143(25.7) 278(27.6) 133(33.6)
 Unknown 540 201(36.2) 251(24.9) 88(22.2)
N stage
 N0 628 179(32.2) 321(31.8) 128(32.3)
 N1 + N2 1103 295(53.1) 584(57.9) 224(56.6)
 Unknown 229 82(14.7) 103(10.2) 44(11.1)
Tumor size
  ≤5 cm 671 175(31.5) 360(35.7) 136(34.3)
 >  5 cm 691 167(30.0) 374(37.1) 150(37.9)
 Unknown 598 214(38.5) 274(27.2) 110(27.8)
CEA
 Negative 196 52(9.4) 115(11.4) 29(7.3)
 Positive 1204 352(63.3) 609(60.4) 243(61.4)
 Unknown 560 152(27.3) 284(28.2) 124(31.3)
PTR
 No 932 329(59.2) 445(44.1) 158(39.9)
 Yes 1028 227(40.8) 563(55.9) 238(60.1)
Chemotherapy
 No 763 223(40.1) 396(39.3) 144(36.4)
 Yes 1197 333(59.9) 612(60.7) 252(63.6)
  1. Abbreviations: MHI median household income, UHFLM unresectable hepatic flexure cancer liver metastasis, UTCLM unresectable transverse colon cancer liver metastasis, USFLM unresectable splenic flexure cancer liver metastasis, CEA carcinoembryonic antigen; PTR, primary tumor resection