Table 1.
Demographic Characteristics of Patients with Colorectal Cancer
| Variable | Value |
|---|---|
| Total patients | 4,822 |
| Male:female | 2,981 (61.8):1,841 (38.2) |
| Age at initial diagnosis, yr | 61.0 (45.0–74.0) |
| Age group, yr* | |
| 45–54 | 1,153 (23.9) |
| 55–64 | 1,962 (40.7) |
| 65–74 | 1,707 (35.4) |
| Follow-up duration, mo | 40.1 (0–384.3) |
| Total follow-up duration, person-year | 16,725.09 |
| Body mass index ≥25 kg/m2 | 1,289 (26.7) |
| Diabetes mellitus | 670 (13.9) |
| Smoking history | |
| Smoker or ex-smoker | 922 (19.1) |
| Never smoker | 3,813 (79.1) |
| Unknown | 87 (1.8) |
| Chemotherapy for colorectal cancer | 3,543 (73.5) |
Data are presented as number (%) or median (range).
*
The age at the diagnosis of colorectal cancer was divided into 10-year groups.