Table 2.
Intraoperative and postoperative data
| Femoral Block ± PCA | PCA only | ||||
|---|---|---|---|---|---|
| N1 | Mean ± SD or N (%) | N2 | Mean ± SD or N | P* | |
| Anesthesia | 31 | 14 (45%) | 54 | 27 (50%) | 0.67 |
| General | 14 (45%) | 27 (50%) | |||
| Regional | 17 (55%) | 27 (50%) | |||
| Intraoperative fentanyl dose (mcg) †** | 31 | 171.3 ± 160.8 | 53 | 259.9 ± 185.5 | 0.03 |
| Length of hospital stay (days) | 29 | 5.7 ± 6.4 | 52 | 5.0 ± 1.9 | 0.58 |
| Altered sleep-wake cycle on POD1 | 30 | 10 (33%) | 51 | 25 (49%) | 0.17 |
| Pain at rest on POD 1 | 31 | 4.6 ± 3.0 | 53 | 4.5 ± 2.9 | 0.89 |
| Change in pain level, preop and POD1 | 31 | 0.9 ± 3.2 | 52 | 1.9 ± 3.7 | 0.20 |
| Benzodiazepine use on POD 1 | 31 | 2 (6%) | 54 | 9 (17%) | 0.18 |
| Hydromorphone dose on POD1(mg)** | 31 | 4.3 ± 4.6 | 54 | 5.9 ± 6.1 | 0.24 |
| Delirium on POD 1 or POD2 | 28 | 7 (25%) | 51 | 31 (61%) | 0.002 |
POD = postoperative day. Preop = preoperative. SD = standard deviation For a continuous variable, the numbers in parenthesis are the range of the variable
†Intraoperative opioid: the amount of intravenous fentanyl administered intraoperatively
*For P-value, i) one-way ANOVA was used for the continuous variables; ii) Chi-square test was used for the categorical variables. If a cell count was less than 5, Fisher's exact test was used. **Wilcoxon non-parametric test was used