Table 1.
Preoperative characteristics of patients using epidural PCA
| Preoperative characteristics | Young patients (n=1,344) |
Elderly patients (n=1,091) |
P-value |
|---|---|---|---|
| Patient characteristics | |||
| Women* | 1,040 (77.4) | 588 (48.2) | <0.001 |
| Age (years)* | 31.9±4.7 | 74.6±3.8 | <0.001 |
| BMI (kg/m2)* | 25.3±3.9 | 23.9±3.4 | <0.001 |
| ASA physical status* | <0.001 | ||
| I | 830 (63) | 179 (16.8) | |
| II | 463 (35.1) | 583 (54.8) | |
| III | 24 (1.8) | 291 (27.4) | |
| IV | 1 (0.1) | 11 (1) | |
| Mixed PCA amounts | |||
| Fentanyl (μg/h)* | 11.7±4.4 | 11±6 | 0.003 |
| Ropivacaine (mg/h)* | 7.5±1.5 | 8±2.8 | <0.001 |
| Medical history | |||
| Hypertension* | 22 (1.6) | 515 (47.2) | <0.001 |
| Diabetes mellitus* | 16 (1.2) | 227 (20.8) | <0.001 |
| Motion sickness* | 128 (9.5) | 52 (4.8) | <0.001 |
| Previous PONV | 12 (0.9) | 10 (0.9) | 0.951 |
| Smoking* | 83 (6.2) | 221 (20.3) | <0.001 |
| Anesthesia-related conditions | |||
| Anesthesia duration (minutes)* | 147±104.7 | 214±130.9 | <0.001 |
| Type of anesthesia* | <0.001 | ||
| General | 397 (29.8) | 674 (62.3) | |
| Spinal | 934 (70.2) | 408 (37.7) | |
| Type of surgery* | <0.001 | ||
| Abdominal | 1,083 (81.7) | 470 (43.4) | |
| Thoracic | 23 (1.7) | 97 (9.2) | |
| Lower extremities | 206 (15.3) | 418 (39.5) | |
| Spinal | 1 (0.1) | 0 | |
| Urogenital | 12 (0.9) | 74 (7) |
Notes:
*
P<0.05. Values are presented as mean ± standard deviation or number (%) of patients.
Abbreviations: PCA, patient-controlled analgesia; BMI, body mass index; ASA, American Society of Anesthesiologists; PONV, postoperative nausea and vomiting.