Baseline characteristics of patients, procedures and surgeons for all procedures combined, by day of the week of surgery
| Characteristic | Day of surgery; no. (%)* | ||||
|---|---|---|---|---|---|
| Monday (n = 77 082) | Tuesday (n = 95 654) | Wednesday (n = 86 853) | Thursday (n = 78 171) | Friday (n = 65 139) | |
| Patient | |||||
| Patient age, yr, mean ± SD | 66.5 ± 11.3 | 66.2 ± 11.6 | 66.5 ± 11.5 | 66.2 ± 11.6 | 66.4 ± 11.7 |
| Patient sex, female | 38 281 (49.7) | 47 209 (49.4) | 42 609 (49.1) | 38 639 (49.4) | 32 405 (49.7) |
| Expected resource utilization | |||||
| Low (RUB 0–3) | 36 961 (48.0) | 45 297 (47.4) | 40 400 (46.5) | 36 844 (47.1) | 30 150 (46.3) |
| Moderate (RUB 4) | 23 983 (31.1) | 30 060 (31.4) | 27 315 (31.4) | 24 598 (31.5) | 20 615 (31.6) |
| High (RUB 5) | 16 138 (20.9) | 20 297 (21.2) | 19 138 (22.0) | 16 729 (21.4) | 14 374 (22.1) |
| Neighbourhood income quintile† | |||||
| 1 (lowest) | 13 721 (17.8) | 16 909 (17.7) | 15 939 (18.4) | 14 107 (18.0) | 11 783 (18.1) |
| 2 | 15 581 (20.2) | 19 477 (20.4) | 17 845 (20.5) | 15 678 (20.1) | 13 166 (20.2) |
| 3 | 15 287 (19.8) | 19 015 (19.9) | 17 275 (19.9) | 15 543 (19.9) | 12 962 (19.9) |
| 4 | 15 911 (20.6) | 19 533 (20.4) | 17 405 (20.0) | 16 160 (20.7) | 13 376 (20.5) |
| 5 (highest) | 16 350 (21.2) | 20 416 (21.3) | 18 121 (20.9) | 16 438 (21.0) | 13 608 (20.9) |
| Surgeon/procedure‡ | |||||
| Teaching hospital | 27 542 (35.7) | 35 069 (36.7) | 30 788 (35.4) | 30 051 (38.4) | 25 026 (38.4) |
| Assistant present | 54 061 (70.1) | 66 302 (69.3) | 61 357 (70.6) | 53 792 (68.8) | 43 799 (67.2) |
| Physician age, yr, mean ± SD | 47.5 ± 9.0 | 49.2 ± 9.1 | 48.8 ± 9.1 | 48.9 ± 9.3 | 47.1 ± 9.6 |
| Physician sex, female | 4427 (5.7) | 3268 (3.4) | 4433 (5.1) | 3360 (4.3) | 3021 (4.6) |
| Years of practice, median (IQR) | 16 (9–24) | 19 (12–26) | 19 (11–25) | 18 (11–26) | 16 (8–24) |
| Non-Canadian medical graduate | 12 664 (16.4) | 13 038 (13.6) | 16 163 (18.6) | 15 032 (19.2) | 10 916 (16.8) |
| Annual procedure volume,§ median (IQR) | 76 (31–120) | 80 (32–125) | 77 (29–117) | 73 (27–116) | 72 (27–118) |
Note: IQR = interquartile range, RUB = Resource Utilization Band, SD = standard deviation.
↵* Unless stated otherwise.
↵† Data missing for 1293 patients.
↵‡ Physician age, sex, years of practice and location of medical school graduation were unknown for a small proportion of procedures (< 0.001%).
↵§ Represents the total number of procedures performed by the attending surgeon during the fiscal year in question, for the specific procedure in question.