Comparison of preoperative factors of oldest against youngest and medium age patients
| Age groups | Youngest versus medium | Youngest versus oldest | Medium versus oldest | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Preoperative factors (%) | Youngest Age 17–64 n=2514 | Medium Age 65–79 n=3795 | Oldest Age 80+ n=4892 | Univariable OR (95% CI) p Value | Multivariable OR (95% CI) p Value | Univariable OR (95% CI) p Value | Multivariable OR (95% CI) p Value | Univariable OR (95% CI) p Value | Multivariable OR (95% CI) p Value |
| Female (%) | 952/2514 (37.9%) | 1526/3795 (40.2%) | 2531/4892 (51.7%) | 1.10 (0.99 to 1.22) 0.062 | 1.14 (1.00 to 1.31) 0.053 | 1.75 (1.59 to 1.94) <0.001* | 1.59 (1.40 to 1.81) <0.001* | 1.59 (1.46 to 1.74) <0.001* | 1.39 (1.25 to 1.55) <0.001* |
| Emergency admission (%) | 2084/2467 (84.5%) | 2909/3717 (78.3%) | 4185/4822 (86.8%) | 0.66 (0.58 to 0.76) <0.001* | 0.72 (0.60 to 0.87) <0.001* | 1.20 (1.05 to 1.38) 0.007* | 1.34 (1.11 to 1.61) 0.002* | 1.82 (1.63 to 2.05) <0.001* | 1.85 (1.59 to 2.14) <0.001* |
| Malignancy present (%) | 455/1612 (28.2%) | 938/2493 (37.6%) | 882/3296 (26.8%) | 1.54 (1.34 to 1.76) <0.001* | 1.31 (1.14 to 1.52) <0.001* | 0.93 (0.81 to 1.06) 0.275 | 0.85 (0.73 to 0.98) 0.025* | 0.60 (0.54 to 0.68) <0.001* | 0.64 (0.57 to 0.72) <0.001* |
| Comorbidity present (%) | 1774/2435 (72.9%) | 3427/3740 (91.6%) | 4801/4866 (98.7%) | 4.08 (3.52 to 4.72) <0.001* | 3.07 (2.56 to 3.70) <0.001* | 27.52 (21.21 to 35.71) <0.001* | 22.05 (15.76 to 30.86) <0.001* | 6.75 (5.15 to 8.84) <0.001* | 6.33 (4.46 to 8.98) <0.001* |
| Patient transferred (%) | 814/2436 (33.4%) | 1070/3719 (28.8%) | 1175/4833 (24.3%) | 0.80 (0.72 to 0.90) <0.001* | 0.89 (0.76 to 1.01) 0.075 | 0.64 (0.58 to 0.71) <0.001* | 0.53 (0.47 to 0.61) <0.001* | 0.80 (0.72 to 0.88) <0.001* | 0.65 (0.58 to 0.74) <0.001* |
| Delay in diagnosis (%) | 205/2409 (8.5%) | 349/3674 (9.5%) | 411/4809 (8.6%) | 1.13 (0.94 to 1.35) 0.190 | 1.33 (1.07 to 1.65) 0.009* | 1.00 (0.84 to 1.19) 0.958 | 0.86 (0.69 to 1.06) 0.160 | 0.89 (0.77 to 1.03) 0.128 | 0.83 (0.68 to 1.00) 0.047* |
| Trauma† (%) | 88/371 (23.7%) | 93/532 (17.5%) | 252/645 (39.1%) | 1.15 (0.90 to 1.48) 0.257 | 1.09 (0.84 to 1.43) 0.507 | 1.21 (0.96 to 1.53) 0.103 | 1.17 (0.90 to 1.51) 0.233 | 1.05 (0.86 to 1.29) 0.617 | 1.07 (0.86 to 1.33) 0.556 |
Reference group: the youngest age group is always the point of comparison (youngest vs medium; youngest vs oldest and medium vs oldest).
*Statistically significant (p<0.05).
†New question in data collection tool (denominators are lower).