Table 1:

Screening rates among patients with stage IV (metastatic) colorectal, lung, breast or prostate cancer

Type of screeningLung cancer
n = 15 948
Breast cancer
n = 1678
Prostate cancer
n = 3366
All patients
n = 20 992
Colorectal screening within 1 yr after diagnosis, %
Overall2.96.313.34.9
By age, yr
 50–743.37.916.05.5
 ≥ 752.13.19.83.7
By screening modality
 FOBT1.53.27.32.6
 Flexible sigmoidoscopy0.2< 0.4*0.50.2
 Colonoscopy1.32.7–3.1*5.52.1
Colorectal screening within 3 yr after diagnosis, %
Overall4.112.327.58.5
Breast cancer screening (n = 10 034)
Rate within 1 yr after diagnosis
Overall8.78.08.5
By age, yr
 50–7410.912.411.3
 ≥ 754.43.03.9
Screening through OBSP
 OBSP2.03.32.3
 Non-OBSP mammogram6.74.66.2
Rate within 3 yr after diagnosis
Overall10.213.111.0
  • Note: FOBT = fecal occult blood test, OBSP = Ontario Breast Screening Program.

  • * Small cell sizes were suppressed to preserve patient anonymity.