Table 2 Comparison of Patient Characteristics, and Preoperative Variables Between different groups
| Variable | Group 1 | Group 2 | Group 3 | F value/χ2 | η2 | P Value |
|---|---|---|---|---|---|---|
| ASA score | 1.5 ± 0.5 | 1.5 ± 0.5 | 1.5 ± 0.5 | 0.617 | 0.012 | 0.723 |
| 1–2 | 51 (85.0%) | 64 (81.0%) | 51 (72.9%) | |||
| 3–4 | 9 (15.0%) | 15 (19.0%) | 19 (27.1%) | |||
| BMI | 27.35 ± 3.64 | 27.19 ± 3.82 | 26.84 ± 3.61 | 0.125 | 0.007 | 0.932 |
| Normal (< 25) | 21 (35.0%) | 28 (35.5%) | 26 (37.1%) | |||
| Overweight (25–30) | 30 (50.0%) | 31 (39.2%) | 30 (42.9%) | |||
| Obese (> 30) | 9 (15.0%) | 20 (25.3%) | 14 (20.0%) | |||
| Anesthesia | ||||||
| General | 1 (1.7%) | 2 (2.5%) | 10 (14.3%) | |||
| Spine | 59 (98.3%%) | 77 (97.5%) | 60 (85.7%) | |||
| Hypertension | 35 (58.3%) | 48 (60.7%) | 57 (81.4%)* | 8.192 | / | 0.036 |
| Diabetes | 18 (30.0%) | 24 (30.4%) | 19 (27.1%) | 0.663 | / | 0.792 |
| Coronary heart disease | 14 (23.3%) | 19 (24.1%) | 20 (28.5%) | 0.386 | / | 0.697 |
| Digestive diseases | 5 (8.3%) | 7 (8.8%) | 7 (10.0%) | 0.286 | / | 0.711 |
| Nervous system disease | 6 (10.0%) | 9 (11.4%) | 12 (17.1%) | 2.861 | / | 0.323 |
| Immune system disease | 1 (1.7%) | 2 (2.5%) | 0 | 2.102 | / | 0.283 |
| Respiratory diseases | 2 (3.3%) | 3 (3.8%) | 7 (10.0%) | 3.287 | / | 0.113 |
| Peripheral vascular disease | 1 (1.7%) | 2 (2.5%) | 6 (8.5%) | 1.983 | / | 0.204 |
| Coagulation abnormalities | 8 (13.3%) | 12 (15.2%) | 11 (15.7%) | 0.582 | / | 0.841 |