TABLE 2.
Demographic and Clinical Characteristics of Colon Cancer Patients: Toronto, ON, and San Francisco, CA, 1996–2006
| Toronto, No. (%) | San Francisco, No. (%) | |
| Age at diagnosis, y | ||
| 25–59 | 206 (22.2) | 219 (21.6) |
| 60–69 | 242 (26.0) | 231 (22.8) |
| 70–79 | 272 (29.2) | 312 (30.8) |
| ≥ 80 | 210 (22.6) | 252 (24.9) |
| Women | 466 (50.1) | 505 (49.8) |
| Stage at diagnosisa | ||
| I | 227** (24.4) | 337** (33.2) |
| II | 215 (23.1) | 229 (22.6) |
| III | 270** (29.0) | 227** (22.4) |
| IV | 218 (23.4) | 221 (21.8) |
| Received surgery | 842 (90.5) | 936 (92.3) |
| Waiting time from diagnosis to surgery, d | ||
| < 14 | 610** (73.8) | 609** (67.4) |
| 14–29 | 125** (15.1) | 205** (22.7) |
| 30–59 | 58 (7.0) | 69 (7.6) |
| ≥ 60 | 33** (4.0) | 20** (2.2) |
| Missing data | 16** (1.9) | 33** (3.5) |
| Received chemotherapy | 266 (28.6) | 316 (31.7) |
| Missing data for receipt of chemotherapy | 0** (0.0) | 16** (1.6) |
| Wait time for chemotherapy | ||
| Had chemotherapy before surgery | 24 (11.3) | 43 (14.0) |
| < 30 d after surgery | 32** (15.1) | 77** (25.1) |
| 30–59 d after surgery | 86 (40.6) | 133 (43.3) |
| ≥ 60 d after surgery | 70** (33.0) | 54** (17.6) |
| Missing data | 54** (20.3) | 33** (10.7) |
| No. of regional lymph nodes examined | ||
| < 6 | 304** (41.1) | 274** (30.3) |
| 6–11 | 282** (38.1) | 312** (34.6) |
| 12–15 | 68** (9.2) | 151** (16.7) |
| ≥ 16 | 86** (11.6) | 166** (18.4) |
| Missing data | 102** (12.1) | 33** (3.5) |
| Survived 5 y from diagnosis | 463 (49.8) | 516 (50.9) |
a
American Joint Committee on Cancer staging.34
**P < .05 for between-country difference (χ2 test).