Table 1.
Hospital and patient characteristics of patients in the study compared to those not included in the study using 2011 hospital‐based cancer registry data
| In the study | Not in the study | P‐values | |
|---|---|---|---|
| n (% or SD) | n (% or SD) | ||
| Hospital characteristics | |||
| Number of hospitals | 178 | 225 | |
| Academic hospitals (%)† | 28 (15.7) | 60 (26.7) | P = 0.01* |
| Hospital volume, mean (SD)‡ | 765.4 (439.1) | 719.0 (426.0) | P = 0.29 |
| Patient characteristics | |||
| Number of patients, (row %) | 136 245 (45.7) | 161 785 (54.3) | |
| Age, mean (SD)‡ | 67.4 (13.2) | 67.4 (13.1) | P = 0.23 |
| Sex, male (%)‡ | 76 771 (56.3) | 93 357 (57.7) | P < 0.01* |
| Cancer type† | |||
| Colorectal (%) | 30 954 (22.7) | 37 265 (23.0) | |
| Stomach (%) | 26 755 (19.6) | 33 585 (20.8) | |
| Lung (%) | 24 363 (17.9) | 29 444 (18.2) | |
| Breast (%) | 20 863 (15.3) | 21 805 (13.5) | |
| Prostate (%) | 17 253 (12.7) | 20 229 (12.5) | |
| Cervical (%) | 8286 (6.1) | 10 374 (6.4) | |
| Liver (%) | 7771 (5.7) | 9083 (5.6) | P < 0.01* |
| Stage† | |||
| 0 (%) | 15 285 (11.2) | 18 239 (11.3) | |
| I (%) | 43 351 (31.8) | 52 700 (32.6) | |
| II (%) | 31 889 (23.4) | 37 334 (23.1) | |
| III (%) | 20 721 (15.2) | 24 524 (15.2) | |
| IV (%) | 23 227 (17.1) | 26 629 (16.5) | |
| Unknown (%) | 1772 (1.3) | 2359 (1.5) | P < 0.01* |
*Statistical significance at alpha = 0.05. †Pearson's χ2‐test. ‡Two sample Student's t‐test.