Skip to main content

Table 1 Demographic and clinical characteristics of patients with CRC and matched controls

From: Trends in healthcare utilization among older Americans with colorectal cancer: A retrospective database analysis

  Colon Cancer Cohort Rectal Cancer Cohort Overall CRC Cohort Comparison Cohort
N 52,371   18,619   70,990   70,990  
Age (mean (± SD)* 77.5 (6.90) 76.5 (6.80) 77.3 (6.90) 77.3 (6.90)
Male* 42.8%   50.5%   44.9%   44.9%  
Race/ethnicity         
   White, non-Hispanic 86.2%   86.9%   86.4%   86.8%  
   African American, non-Hispanic 7.8%   6.1%   7.3%   6.5%  
   Hispanic, any race 1.1%   1.2%   1.1%   1.9%  
   Other 5.0%   5.7%   5.2%   4.8%  
Geographic region*         
   Northeast 19.3%   19.6%   19.4%   19.4%  
   Midwest 27.3%   27.6%   27.4%   27.4%  
   West 42.0%   42.4%   42.1%   42.1%  
   South 11.3%   10.4%   11.1%   11.1%  
Charlson score (mean (± SD)1 0.5 (1.00) 0.4 (0.90) 0.5 (1.00) 0.4 (0.90)
Selected Charlson comorbidities         
   Chronic pulmonary/respiratory disease 8.9%   7.9%   8.6%   7.1%  
   Congestive heart failure 7.9%   6.0%   7.4%   5.9%  
   Diabetes without complications 10.1%   8.4%   9.6%   7.6%  
   Cerebrovascular disease 6.0%   4.8%   5.7%   5.7%  
   Myocardial infarction 3.2%   2.5%   3.0%   2.6%  
   Peptic ulcer 2.4%   1.5%   2.2%   1.2%  
   Other major conditions2 7.2%   7.2%   7.2%   7.3%  
Stage at diagnosis (%)         
   Stage I 23.7%   32.4%   26.0%   **  
   Stage II 34.6%   25.1%   32.1%   **  
   Stage III 24.6%   22.2%   23.9%   **  
   Stage IV 17.2%   20.2%   18.0%   **  
  1. Source: Authors' calculations based on SEER-Medicare data, 1992-2005. 1Modified Charlson comorbidity index: excludes cancer-related comorbidities. 2Other major conditions include rheumatologic disease, mild liver disease, diabetes with complications, major liver disease, peripheral vascular disease, dementia, renal disease, hemiplegia or paraplegia, and AIDS.
  2. *Variables used in matching cohorts
  3. **Data not available/not applicable