Table 1.
Patient characteristics in total and matched cohorts.
| Characteristic | Total set | Matched set | ||||||
|---|---|---|---|---|---|---|---|---|
| Group R (n = 589) |
Group P (n = 166) |
STD (%) | P value | Group R (n = 152) |
Group P (n = 152) |
STD (%) | P value | |
| Age | 42.68 ± 19.96 | 39.64 ± 12.66 | −16.34 | 0.056 | 39.95 ± 12.82 | 39.36 ± 14.42 | −4.32 | 0.675 |
| Height | 159.14 ± 6.93 | 159.68 ± 9.21 | 7.21 | 0.418 | 159.23 ± 5.91 | 159.45 ± 8.32 | 3.05 | 0.735 |
| Weight | 57.66 ± 9.15 | 57.46 ± 9.74 | −2.15 | 0.810 | 57.60 ± 9.03 | 57.51 ± 8.32 | −1.04 | 0.923 |
| OP time | 139.21 ± 111.01 | 156.36 ± 165.98 | 13.7 | 0.113 | 136.62 ± 93.18 | 152.51 ± 165.53 | 11.83 | 0.263 |
| PCA fentanyl (mcg) | 1041.23 ± 145.94 | 1102.99 ± 195.97 | 39.02 | <0.001 | 1064.63 ± 191.24 | 1081.55 ± 191.49 | 8.84 | 0.412 |
| Smoking | 40 (7.0) | 14 (7.8) | 10.81 | 0.712 | 8 (5.3) | 8 (5.3) | 0 | 1.000 |
| PONV history | 30 (5.3) | 13 (7.3) | 31.75 | 0.313 | 11 (7.2) | 10 (6.6) | −8.33 | 1.000 |
| Premedication | 365 (63.9) | 69 (38.5) | 49.61 | <0.001 | 69 (45.4) | 63 (41.4) | −8.81 | 0.135 |
| Sevoflurane | 203 (35.6) | 72 (40.2) | 12.14 | 0.258 | 56 (36.8) | 65 (42.8) | 16.30 | 0.336 |
| Desflurane | 368 (64.4) | 107 (59.8) | 7.41 | 0.258 | 96 (63.2) | 97 (63.8) | 0.95 | 0.981 |
| N2O | 481 (84.2) | 130 (72.6) | 14.80 | <0.001 | 122 (80.3) | 118 (77.6) | −3.36 | 0.418 |
| Preintubation opioid | 425 (74.4) | 111 (62.0) | 18.18 | 0.001 | 101 (66.4) | 99 (65.1) | −1.96 | 0.838 |
| Remifentanil | 42 (7.4) | 15 (8.4) | 12.66 | 0.652 | 15 (9.9) | 12 (7.9) | −20.20 | 0.664 |
| Acupan | 289 (50.6) | 54 (30.2) | 50.50 | <0.001 | 58 (38.2) | 52 (34.2) | −10.47 | 0.504 |
Values are expressed as mean ± SD, absolute number (percentages), or absolute number. OP: operation, STD: standardized difference, PONV: postoperative nausea and vomiting, and PCA: patient-controlled analgesia.