Table 2.
Demographic data
| Patients in analysis (1327) |
Excluding missing values | |
| Age groups: | ||
| < 35 | 6 (0.5%) | 6 (0.5%) |
| 35–44 | 46 (3.5%) | 46 (3.5%) |
| 45–54 | 154 (11.6%) | 154 (11.9%) |
| 55–64 | 373 (28.1%) | 373 (28.7%) |
| 65–74 | 456 (34.4%) | 456 (35.1%) |
| 75–84 | 245 (18.5%) | 245 (18.9%) |
| 85+ | 18 (1.4%) | 18 (1.4%) |
| Missing | 29 (2.2%) | |
| Age (mean, SD) | 65.7, 10.9 | |
| Sex: | ||
| Male | 559 (42.1%) | 559 (44.1%) |
| Female | 708 (53.4%) | 708 (55.9%) |
| Missing | 60 (4.5%) | |
| BMI groups: | ||
| Underweight (< 18.5) | 2 (0.2%) | 2 (0.2%) |
| Normal (18.5 to < 25) | 359 (27.1%) | 359 (29.3%) |
| Overweight (25 to < 30) | 568 (42.8%) | 568 (46.4%) |
| Obese (30 to < 40) | 281 (21.2%) | 281 (22.9%) |
| Morbidly Obese (40+) | 15 (1.1%) | 15 (1.2%) |
| Missing | 102 (7.7%) | |
| BMI (mean, SD) | 27.5, 4.4 | |
| Employment status: | ||
| Employed | 325 (24.5%) | 325 (25.1%) |
| Retired | 740 (55.8%) | 740 (57.2%) |
| Unemployed | 31 (2.3%) | 31 (2.4%) |
| Retired Early | 105 (7.9%) | 105 (8.1%) |
| Voluntary work | 5 (0.4%) | 5 (0.4%) |
| Housework | 88 (6.6%) | 88 (6.8%) |
| Missing | 33 (2.5%) | |
| Qualifications after leaving school: | ||
| Postgraduate degree | 52 (3.9%) | 52 (4.5%) |
| University degree | 149 (11.2%) | 149 (12.9%) |
| College diploma, or equivalent | 371 (28.0%) | 371 (32.2%) |
| None | 581 (43.8%) | 581 (50.4%) |
| Missing | 174 (13.1%) | |
| ASA status: | ||
| 1 | 209 (15.8%) | 209 (17.8%) |
| 2 | 719 (54.2%) | 719 (61.2%) |
| 3 | 237 (17.9%) | 237 (20.2%) |
| 4 | 10 (0.8%) | 10 (0.9%) |
| Missing | 152 (11.5%) | |
| Caring for someone else: | ||
| Yes | 234 (17.6%) | 234 (18.1%) |
| No | 1061 (80.0%) | 1061 (81.9%) |
| Missing | 32 (2.4%) |