Characteristics of patients with breast (female), colorectal, lung or prostate cancer diagnosed between 2010 and 2015 in Ontario, by primary cancer site
| Characteristic | No. (%) of patients* | ||||
|---|---|---|---|---|---|
| Breast cancer n = 50 141 | Colorectal cancer n = 38 108 | Lung cancer n = 34 809 | Prostate cancer n = 45 258 | Total n = 168 316 | |
| Female | 50 141 (100.0) | 17 327 (45.5) | 17 001 (48.8) | 0 (0.0) | 84 469 (50.2) |
| Age at cancer diagnosis, yr | |||||
| Mean ± SD | 61.3 ± 13.7 | 68.4 ± 13.3 | 68.8 ± 10.4 | 67.5 ± 9.5 | 66.1 ± 12.4 |
| Median (IQR) | 61 (51–71) | 69 (59–79) | 69 (62–76) | 67 (61–74) | 66 (58–75) |
| Rural residence† | 6176 (12.3) | 5642 (14.8) | 5523 (15.9) | 6513 (14.4) | 23 854 (14.2) |
| Neighbourhood income quintile2 | |||||
| Lowest | 8497 (16.9) | 7217 (18.9) | 8232 (23.6) | 6934 (15.3) | 30 880 (18.3) |
| Second lowest | 9608 (19.2) | 7754 (20.3) | 7538 (21.7) | 8442 (18.7) | 33 342 (19.8) |
| Middle | 9918 (19.8) | 7705 (20.2) | 6772 (19.5) | 8910 (19.7) | 33 305 (19.8) |
| Second highest | 10 873 (21.7) | 7804 (20.5) | 6479 (18.6) | 9804 (21.7) | 34 960 (20.8) |
| Highest | 11 048 (22.0) | 7461 (19.6) | 5635 (16.2) | 10 986 (24.3) | 35 130 (20.9) |
| Missing | 197 (0.4) | 167 (0.4) | 153 (0.4) | 182 (0.4) | 699 (0.4) |
| Cancer stage at diagnosis | |||||
| I | 20 759 (41.4) | 8269 (21.7) | 6104 (17.5) | 10 154 (22.4) | 45 286 (26.9) |
| II | 18 607 (37.1) | 9124 (23.9) | 2855 (8.2) | 22 103 (48.8) | 52 689 (31.3) |
| III | 6786 (13.5) | 10 755 (28.2) | 6989 (20.1) | 5664 (12.5) | 30 194 (17.9) |
| IV | 2433 (4.9) | 6848 (18.0) | 17 714 (50.9) | 4058 (9.0) | 31 053 (18.4) |
| Unknown | 1556 (3.1) | 3112 (8.2) | 1147 (3.3) | 3279 (7.2) | 9094 (5.4) |
| Charlson Comorbidity Index score‡ | |||||
| 0 | 13 232 (26.4) | 20 017 (52.5) | 13 051 (37.5) | 17 244 (38.1) | 63 544 (37.8) |
| 1 | 1896 (3.8) | 4017 (10.5) | 3543 (10.2) | 2529 (5.6) | 11 985 (7.1) |
| ≥ 2 | 1215 (2.4) | 2723 (7.1) | 3123 (9.0) | 1832 (4.0) | 8893 (5.3) |
| Not admitted to hospital | 33 798 (67.4) | 11 351 (29.8) | 15 092 (43.4) | 23 653 (52.3) | 83 894 (49.8) |
| Months of follow-up§ | |||||
| Mean ± SD | 11.4 ± 2.3 | 10.1 ± 3.9 | 7.7 ± 4.6 | 11.6 ± 1.8 | 10.4 ± 3.5 |
| Median (IQR) | 12 (12–12) | 12 (12–12) | 9 (3–12) | 12 (12–12) | 12 (12–12) |
| Died during follow-up§ | 1782 (3.6) | 6369 (16.7) | 17 745 (51.0) | 1535 (3.4) | 27 431 (16.3) |
| Died within 2 yr after diagnosis | 3557 (7.1) | 9971 (26.2) | 23 506 (67.5) | 3256 (7.2) | 40 290 (23.9) |
| Had an entire year of follow-up§ | 46 574 (92.9) | 29 434 (77.2) | 15 482 (44.5) | 42 865 (94.7) | 134 355 (79.8) |
| Reason for end of follow-up§ | |||||
| Died during follow-up | 1782 (3.6) | 6369 (16.7) | 17 745 (51.0) | 1535 (3.4) | 27 431 (16.3) |
| Had second cancer | 1787 (3.6) | 2314 (6.1) | 1598 (4.6) | 865 (1.9) | 6564 (3.9) |
| End of 1-yr follow-up | 46 572 (92.9) | 29 425 (77.2) | 15 466 (44.4) | 42 858 (94.7) | 134 321 (79.8) |
Note: CI = confidence interval, IQR = interquartile range, SD = standard deviation.
↵* Except where noted otherwise.
↵† Urban = population 10 000 or more, rural = population less than 10 000.2
↵‡ Calculated with the use of hospital admission data in the 2 years before cancer diagnosis.
↵§ End of follow-up was defined as the earliest of date of death, 1 year after cancer diagnosis or 1 day before the diagnosis of a second cancer.