Demographic characteristics of 20 881 surgeries scheduled between June 1, 2012, and Jan. 31, 2016
| Characteristic | No. (%) of cancelled surgeries* n = 2933 | No. (%) of patients contacted for interview n = 175 | No. (%) of patients interviewed n = 72 | No. (%) of nonrespondents† n = 103 |
|---|---|---|---|---|
| Male | 1527 (52.1) | 90 (51.4) | 33 (45.8) | 57 (55.3) |
| Female | 1398 (47.7) | 85 (48.6) | 39 (54.2) | 46 (44.7) |
| Age, yr, mean ± SD | 56.5 ± 18.7 | 57.2 ± 17.3 | 58.4 ± 15.2 | 60.7 ± 16.0 |
| ASA 1–2 | 1650 (56.2) | 33 (18.8) | 41 (56.9) | 49 (47.6) |
| ASA 3–4 | 891 (30.4) | 125 (71.4) | 22 (30.6) | 45 (43.7) |
ASA = American Society of Anesthesiologists physical status classification; SD = standard deviation.
↵* Sex was not documented for 8 of 2933 patients; ASA classification was not documented for 392 patients.
↵† Respondents and nonrespondents did not differ significantly; p = 0.216 for sex, p = 0.341 for age and p = 0.108 for ASA.