Table 2. Pain Severity at Different Times a,b.
| Pain Severity | IVPCA (n = 45) | PCEA (n = 45) | Total (n = 90) |
|---|---|---|---|
| VAS 2 hours after surgery | 3.71 ± 0.89 | 2.87 ± 1.23 | 3.29 ± 1.15 |
| VAS 4 hours after surgery | 3.20 ± 1.29 | 2.91 ± 3.20 | 3.06 ± 1.24 |
| VAS 8 hours after surgery | 2.67 ± 1.36 | 2.53 ± 0.99 | 2.60 ± 1.18 |
| VAS 12 hours after surgery | 2.11 ± 1.15 | 2.24 ± 0.83 | 2.18 ± 1.00 |
| VAS 24 hours after surgery | 0.69 ± 0.73 | 1.51 ± 1.14 | 1.10 ± 1.03 |
| VAS 36 hours after surgery | 0.31 ± 0.59 | 0.31 ± 0.66 | 0.31 ± 0.63 |
| VAS 48 hours after surgery | 0.20 ± 0.50 | 0.56 ± 0.01 | 0.38 ± 0.15 |
| VAS at the first ambulation | 2.67 ± 0.02 | 1.89 ± 0.93 | NA |
a Data are shown as mean ± standard deviation.
b Abbreviations: IVPCA, Intravenous Patient-controlled Analgesia; PCEA, Patient Controlled Epidural Analgesia; VAS, Visual Analogue Scale.