| Non-dexamethasone (N = 2392) | Dexamethasone (N = 236) | P-value |
---|---|---|---|
Demographic data | |||
 Age (years) | 50.1 ± 10.3 | 49.5 ± 9.3 | 0.418 |
 BMI (kg m−2) | 23.3 ± 3.1 | 23.4 ± 3.1 | 0.764 |
 Comorbidity | |||
  HTN | 473 (19.8) | 44 (18.6) | 0.732 |
  DM | 172 (7.2) | 14 (5.9) | 0.594 |
  Cardiac disease | 60 (2.5) | 4 (1.7) | 0.656 |
  Pulmonary disease | 46 (1.9) | 6 (2.5) | 0.463 |
  Endocrine disease | 109 (4.6) | 14 (5.9) | 0.332 |
  Renal disease | 16 (0.7) | 1 (0.4) | > 0.999 |
  Liver disease | 16 (0.7) | 2 (0.8) | 0.673 |
  Neurological disease | 40 (1.7) | 4 (1.7) | > 0.999 |
  Others | 14 (0.6) | 3 (1.3) | 0.191 |
Anaesthetic factors | |||
 Anaesthetic agent |  |  | 0.001 |
  Volatiles | |||
   Sevoflurane | 1461 (61.1) | 141 (59.7) |  |
   Desflurane | 613 (25.6) | 47 (19.9) |  |
   Isoflurane | 242 (10.1) | 27 (11.4) |  |
   Enflurane | 31 (1.3) | 10 (4.2) |  |
  TIVA | 45 (1.9) | 11 (4.7) |  |
 Induction agents |  |  | 0.029 |
  Propofol | 1856 (77.6) | 168 (71.2) |  |
  Barbiturate | 536 (22.4) | 68 (28.8) |  |
N2O | 176 (7.4) | 28 (11.9) | 0.021 |
Premedicationa | 1585 (66.3) | 169 (71.6) | 0.111 |
Antiemetic | 2069 (86.5) | 180 (76.3) | < 0.001 |
Rescue analgesics | 2297 (96.0) | 225 (95.3) | 0.602 |
Hypertensive events | 145 (6.1) | 15 (6.4) | 0.886 |
Hypotensive events | 343 (14.3) | 25 (10.6) | 0.140 |
Colloid administration | 36 (1.5) | 6 (2.5) | 0.267 |
RBC transfusion | 12 (0.5) | 0 (0) | 0.616 |
Surgical factors | |||
 Surgical procedure |  |  | 0.014 |
  BCS | 1156 (48.3) | 94 (39.8) |  |
  Mastectomy | 1218 (51.7) | 170 (60.2) |  |
 Surgical duration (min) | 207.2 ± 131.0 | 212.5 ± 108.5 | 0.487 |
 TNM staging |  |  | 0.974 |
  1 | 1126 (47.1) | 113 (47.9) |  |
  2 | 876 (36.7) | 86 (36.4) |  |
  3 | 387 (16.2) | 37 (15.7) |  |
 Receptors | |||
  Oestrogen | 1652 (69.1) | 173 (73.3) | 0.183 |
  Progesterone | 1506 (63.0) | 151 (64.0) | 0.778 |
  HER2 | 658 (27.5) | 60 (25.4) | 0.540 |
 Histological analysis |  |  | 0.118 |
  Well-differentiated | 508 (21.2) | 48 (20.3) |  |
  Moderately differentiated | 1058 (44.2) | 105 (44.5) |  |
  Poorly differentiated | 584 (24.4) | 48 (20.3) |  |
  Others | 242 (10.1) | 35 (14.8) |  |
 Tumour types |  |  | 0.818 |
  IDC | 2105 (88.0) | 212 (87.7) |  |
  ILC | 85 (3.6) | 10 (4.2) |  |
  Others | 202 (8.4) | 19 (8.1) |  |
 Chemotherapy | 1619 (67.7) | 179 (75.8) | 0.010 |
 Radiotherapy | 1559 (65.2) | 137 (58.1) | 0.032 |