Retrospective Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Jan 28, 2015; 21(4): 1234-1242
Published online Jan 28, 2015. doi: 10.3748/wjg.v21.i4.1234
Table 3 Patient characteristics according to hospital type and hospital volume in non-surgical treatment patients (n = 3955) n (%)
VariablesMedical center
Hospital volume
Hospital volume
YesNoP valueQ1-2Q3-4P valueQ1-3Q4P value
SexNSNSNS
Male2523 (95.0)1220 (94.0)1917 (94.2)1826 (95.1)2845 (94.8)898 (94.2)
Female133 (5.0)79 (6.0)118 (5.8)94 (4.9)157 (5.2)55 (5.8)
Age (yr)< 0.05aNSNS
< 4084 (3.2)29 (2.2)50 (2.5)63 (3.3)83 (2.8)30 (3.1)
40-49536 (20.2)315 (24.2)425 (20.1)426 (22.2)636 (21.2)215 (22.6)
50-59957 (36.0)433 (33.3)723 (35.5)667 (34.7)1052 (35.0)338 (35.5)
60-69587 (22.1)255 (19.6)417 (20.5)425 (22.1)645 (21.5)197 (20.7)
70-79304 (11.4)187 (14.4)270 (13.3)221 (11.5)371 (12.4)120 (12.6)
≥ 80188 (7.1)80 (6.2)150 (7.4)118 (6.1)215 (7.2)53 (5.6)
Tumor locationNS< 0.01dNS
Upper third759 (28.6)430 (33.1)680 (33.4)509 (26.5)642 (21.4)174 (18.3)
Middle third841 (31.7)501 (38.6)773 (38.0)569 (29.6)1079 (35.9)263 (27.6)
Lower third336 (12.7)169 (13.0)222 (10.9)283 (14.7)694 (23.1)184 (19.3)
Unknown720 (27.1)199 (15.3)360 (17.7)559 (29.1)587 (19.6)332 (34.8)
Tumor differentiationNS< 0.05c< 0.01d
Well50 (1.9)27 (2.1)43 (2.1)34 (1.8)66 (2.2)11 (1.1)
Moderate985 (37.1)577 (44.4)910 (44.7)652 (34.0)1176 (39.1)386 (40.5)
Poorly547 (20.1)264 (20.3)428 (21.0)383 (19.9)534 (17.8)277 (29.1)
Unknown1074 (40.4)431 (33.2)654 (32.1)851 (44.3)1226 (40.8)279 (29.3)
Clinical stage< 0.01b< 0.01d< 0.05c
0/I70 (2.7)67 (5.2)77 (3.6)60 (3.3)111 (3.9)26 (2.5)
II272 (10.2)200 (15.4)298 (14.1)174 (9.5)375 (12.9)97 (9.3)
III1184 (44.6)509 (39.2)865 (40.9)828 (45.0)1233 (42.4)460 (43.9)
IV1071 (40.3)507 (39.0)841 (39.8)737 (40.0)1138 (39.1)440 (42.0)
Unknown59 (2.2)16 (1.2)32 (1.5)43 (2.3)51 (1.8)24 (2.3)
Treatment modality< 0.05a< 0.01d< 0.01d
Chemotherapy234 (8.8)99 (7.6)175 (8.3)158 (8.6)228 (7.8)105 (10.0)
Radiotherapy259 (9.8)183 (14.1)282 (13.4)160 (8.7)362 (12.5)80 (7.6)
Chemoradiation2040 (76.8)980 (75.4)1572 (74.4)1448 (78.6)2206 (75.9)814 (77.8)
Unknown123 (4.6)37 (2.9)84 (4.0)76 (4.1)112 (3.9)48 (4.6)
Stage-specific 3-yr survival
Stage I33.44%48.35%41.81%43.03%42.23%45.86%
Stage II21.1%21.12%22.53%18.74%22.60%15.76%
Stage III11.84%14.11%12.61%12.32%12.61%12.03%
Stage IV6.6%5.05%6.2%6.03%6.04%6.36%