Table 4: Receipt of chemotherapy and radiation therapy among 6,862 patients diagnosed with stages II and III colorectal cancer, 1990–2010, by age and stage at diagnosis.

Stage II ( = 3,329)Stage III ( = 3,533)
Age < 50Age 50–69Age ≥ 70Age < 50Age 50–69Age ≥ 70
(wt.%) (wt.%) (wt.%) (wt.%) (wt.%) (wt.%)

Received chemotherapy1
 Colon cancer
  No71 (29.2)465 (57.4)809 (86.0)43 (18.0)156 (17.9)439 (50.9)
  Yes121 (70.8)281 (42.6)131 (14.0)180 (82.0)621 (82.1)390 (49.1)
 Rectal cancer
  No28 (17.6)216 (34.3)323 (52.3)24 (6.0)101 (9.1)264 (42.3)
  Yes128 (82.4)444 (65.7)225 (47.7)248 (94.0)674 (90.9)307 (57.7)
Received radiation therapy2
 Rectal cancer
  No45 (28.5)241 (39.0)342 (57.1)67 (23.3)253 (30.1)357 (57.8)
  Yes112 (71.5)431 (61.0)214 (42.9)209 (76.7)531 (69.9)227 (42.2)

.
Note. Proportions weighted by sampling fraction.
wt.: weighted.
1Receipt of chemotherapy includes both neoadjuvant and adjuvant (or both) chemotherapy.
2Receipt of radiation therapy includes postoperative and preoperative radiation.