Table 4.
Visual analogue scale scores at rest before the operation, after the operation (at each time point), and throughout the 24-hour measurement period in breast cancer patients receiving paravertebral block*
| VAS measurement timing | Median (95% CI) VAS score |
P | |
|---|---|---|---|
| LG group (n = 40) | LLG group (n = 40) | ||
| Before operation |
1 (1.0-2.0) |
1 (1.0-1.0) |
0.270† |
| 3 h postoperative |
1 (1.0-2.0) |
2 (2.0-4.0) |
0.039† |
| 6 h postoperative |
2 (2.0-3.0) |
2 (2.0-4.0) |
0.286† |
| 9 h postoperative |
2 (2.0-4.0) |
2 (2.0-4.0) |
0.425† |
| 12h postoperative |
2 (2.0-4.0) |
2 (2.0-4.0) |
0.462† |
| 15 h postoperative |
2 (2.0-4.0) |
2 (2.0-4.0) |
0.544† |
| 18 h postoperative. |
2 (2.0-4.0) |
2 (2.0-4.0) |
0.580† |
| 21 h postoperative |
2 (2.0-4.0) |
2 (2.0-4.0) |
0.560† |
| 24 h postoperative |
2 (2.0-4.0) |
2 (2.0-5.0) |
0.574† |
| over 24 h (ln values; LS means, SE) | 0.60 (0.03) | 0.63 (0.03) | 0.595‡ |
*Abbreviations: VAS – visual analogue scale; CI – confidence interval; LG – 0.5% levobupivacaine; LLG – 0.5% levobupivacaine +2% lidocaine; ln – natural logarithm; LS – least square, SE – Standard error.
†Mann-Whitney U test.
‡RM-ANOVA.