Table 1 Characteristics and perioperative data before and after propensity score matching of ASA-PS 1 and 2 patients
| Â | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
ASA PS 1 (n = 55,893) | ASA PS 2 (n = 82,822) | ASD | ASA PS 1 (n = 43,400) | ASA PS 2 (n = 43,400) | ASD | |
Young age (< 50) | 41,342 (74.0) | 32,061 (38.7) | 0.72 | 28,849 (66.5) | 27,588 (63.6) | 0.06 |
Female | 28,933 (51.8) | 42,983 (51.9) | 0 | 22,588 (52.0) | 22,727 (52.4) | 0.01 |
Obesity | 2462 (4.4) | 8913 (10.8) | 0.21 | 2462 (5.7) | 2728 (6.3) | 0.02 |
Smoking | 11,801 (21.1) | 14,761 (17.8) | 0.09 | 8899 (20.5) | 8764 (20.2) | 0.01 |
Menstruation | 93 (0.2) | 43 (0.1) | 0.05 | 38 (0.1) | 39 (0.1) | 0 |
Levin tube | 243 (0.4) | 1499 (1.8) | 0.1 | 243 (0.6) | 330 (0.8) | 0.02 |
General anesthesia | 46,047 (82.4) | 69,513 (83.9) | 0.04 | 35,489 (81.8) | 35,856 (82.6) | 0.02 |
Inhalation anesthetics | 42,782 (76.5) | 64,464 (77.8) | 0.03 | 32,768 (75.5) | 33,234 (76.6) | 0.03 |
N2O | 5947 (10.6) | 7500 (9.1) | 0.06 | 4182 (9.6) | 3984 (9.2) | 0.02 |
Remifentanil | 24,888 (44.5) | 49,275 (59.5) | 0.3 | 22,877 (52.7) | 23,421 (54.0) | 0.03 |
Steroid | 2285 (4.1) | 3647 (4.4) | 0.02 | 1771 (4.1) | 1768 (4.1) | 0 |
Neostigmine | 7546 (13.5) | 17,197 (20.8) | 0.18 | 7414 (17.1) | 8037 (18.5) | 0.04 |
Anticholinergics | 45,809 (82.0) | 68,716 (83.0) | 0.03 | 35,234 (81.2) | 35,563 (81.9) | 0.02 |
Antiemetics | 41,048 (73.4) | 64,851 (78.3) | 0.12 | 32,232 (74.3) | 32,482 (74.8) | 0.01 |
Laparoscopic surgery | 14,841 (26.6) | 17,392 (21.0) | 0.14 | 10,288 (23.7) | 10,286 (23.7) | 0 |
Abdominal surgery | 11,133 (19.9) | 15,353 (18.5) | 0.04 | 7965 (18.4) | 8027 (18.5) | 0 |
GY surgery | 7756 (13.9) | 8713 (10.5) | 0.11 | 6083 (14.0) | 6011 (13.9) | 0.01 |
EYE surgery | 438 (0.8) | 1072 (1.3) | 0.05 | 416 (1.0) | 443 (1.0) | 0.01 |
ENT surgery | 7819 (14.0) | 8139 (9.8) | 0.14 | 5193 (12.0) | 5150 (11.9) | 0 |
Head and neck surgery | 2553 (4.6) | 4149 (5.0) | 0.02 | 2185 (5.0) | 2237 (5.2) | 0.01 |
Anesthesia time (h) | 1.4 (1.0, 2.2) | 1.8 (1.1, 2.7) | 0.25 | 1.5 (1.0, 2.3) | 1.6 (1.1, 2.3) | 0.03 |
Recovery room time (h) | 0.5 (0.4, 0.6) | 0.5 (0.5, 6.0) | 0.13 | 0.5 (0.4, 0.6) | 0.5 (0.4, 0.6) | 0.02 |
NPO time (h) | 11.5 (9.2, 14.0) | 11.2 (8.8, 13.6) | 0.11 | 11.3 (9.0, 13.8) | 11.3 (9, 13.8) | 0.01 |
Input and output (ml/kg) | 5.2 (3.2, 8.2) | 6.0 (3.5, 10.0) | 0.19 | 5.5 (3.4, 8.7) | 5.5 (3.3, 9.0) | 0.02 |
Opioid in OR and RR (mg/kg) | 5.0 (0.3, 7.5) | 4.0 (0.2, 5.8) | 0.09 | 4.0 (0.2, 6.3) | 4.0 (0.0, 6) | 0 |
Opioid after RR (mg/kg) | 0.0 (0.0, 47.3) | 0.0 (0.0, 94.3) | 0.18 | 0.0 (0.0, 66.9) | 0.0 (0.0, 73.5) | 0.03 |