Table 2

Treatment practice patterns of patients who received diagnoses of colorectal cancer in Alberta from 2004 to 2015

CharacteristicNo. (%) of patients*p value
Patients aged < 50 yr
n = 1583
Patients aged ≥ 50 yr
n = 16 487
Health care facility type
 Academic841 (53 .1)8436 (51 .2)0.1363
 Community742 (46.9 )8051 (48.8)
Surgery
 Overall1381 (87.2)13 334 (80.9)< 0.0001
 Stage I270 (99.6)2264 (96.0)0.0024
 Stage II250 (98.0)3355 (96.9)0.289
 Stage III256 (98.4)2309 (96.0)0.0455
 Stage IV131 (49.6)904 (39.6)0.0017
 Unknown474 (88.9)4502 (75.4)< 0.0001
Chemotherapy
 Overall943 (59.6)5625 (34.1)< 0.0001
 Stage I6 (2.2)34 (1.4)0.3249
 Stage II125 (49.0)682 (19.7)< 0.0001
 Stage III232 (89.2)1612 (67.0)< 0.0001
 Stage IV214 (81.0)1149 (50.3)< 0.0001
 Unknown366 (69.7)2148 (36.6)< 0.0001
Radiation (rectal)
 Overall360 (64.0)2221 (50.9)< 0.001
 Stage I5 (4.8)39 (4.1)0.6642
 Stage II50 (56.2)393 (38.0)0.0008
 Stage III101 (70.1)669 (64.0)0.1456
 Stage IV54 (47.8)254 (34.1)0.0076
 Unknown150 (55.6)866 (40.4)< 0.0001
  • * Percentages represent the proportion of patients at each stage treated with a particular modality.

  • The total number of patients younger than 50 years with rectal cancer was 563. The total number of patients aged 50 years or older with rectal cancer was 4363.