Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 4 Clinical characteristics of left-sided and right-sided CRC in the SEER database

From: Analysis of prognosis, genome, microbiome, and microbial metabolome in different sites of colorectal cancer

  RS LS Total
Median age (min–max) 71 (13–108) 63 (11–106) 67 (11–108)
Gender
 Male 22.99 27.58 50.57
 Female 27.64 21.79 49.43
Race (%)
 White 40.65 38.82 79.47
 Black 6.52 4.99 11.51
 Asian 2.84 4.73 7.57
 Other 0.61 0.85 1.46
Stage at presentation (%)
 Stage 0 0.61 0.50 1.11
 Stage I 10.67 11.23 21.90
 Stage II 16.67 13.66 30.32
 Stage III 15.53 17.53 33.06
 Stage IV 7.14 6.46 13.60
Histologic subtype (%)
 Adenocarcinoma 43.49 46.04 89.54
 Mucinous adenocarcinoma 5.67 2.69 8.37
 Other 1.45 0.64 2.10
Histologic grade (%)
 Well differentiated 4.33 4.21 8.54
 Moderately differentiated 33.63 37.77 71.40
 Poorly differentiated 10.85 6.58 17.43
 Undifferentiated 1.81 0.82 2.63
Adequate lymph node examination (more than 12 nodes) (%)
 Yes 41.94 34.62 76.56
 No 8.57 14.60 23.17
 Missing data 0.11 0.16 0.27
Type of surgery (%)
 Local excision 0.06 0.39 0.45
 Partial colectomy 9.93 34.68 44.60
 Hemicolectomy 39.34 8.43 47.77
 Total colectomy 0.70 4.34 5.04
 Other colectomy 0.55 1.38 1.94
 No surgery 0.04 0.15 0.19
Chemotherapy (%)
 Yes 15.59 24.48 40.07
 No/unknown 35.03 24.90 59.93
Radiation therapy (%)
 Yes 0.53 12.26 12.79
 No/unknown 50.09 37.12 87.21
  1. All patients diagnosed with colon and rectal adenocarcinoma from 2006 to 2015 in the SEER database were included. Right-sided (RS) CRC includes cancers located in the cecum, ascending colon, and transverse colon, and left-sided (LS) CRC includes those located in the descending colon, sigmoid colon, and rectum. A total of 179,323 CRC patients were included after screening