Table 2. Baseline characteristics of patients.
|
Outpatient preoperative evaluation |
P-value | ||
|---|---|---|---|
| YES (n=240) | NO (n=728) | ||
| Age (years)a | 73 (67.0–78.5) | 70 (62.0–76.0) | 0.001 |
| Weight (kg)b | 69.4±13.3 | 69.1±13.1 | 0.749 |
| Female sex | 135 (56.3) | 457 (62.8) | 0.072 |
| Surgical technique | |||
| Extracapsular cataract extraction | 21 (8.8) | 56 (7.7) | 0.592 |
| Phacoemulsification | 217 (91.2) | 671 (92.3) | |
| Anesthetic technique | |||
| Peribulbar block | 233 (97.0) | 718 (98.6) | 0.235 |
| General anesthesia | 6 (2.5) | 10 (1.4) | |
| Prexisting comorbidities | |||
| Arrhythmia | 38 (15.8) | 40 (5.5) | 0.001 |
| Congestive heart failure | 27 (11.3) | 9 (1.2) | 0.001 |
| Coronary artery disease | 66 (27.5) | 31 (4.3) | 0.001 |
| Creatinine≥2 mg/dl | 17 (7.7) | 15 (2.5) | 0.001 |
| Diabetes | 98 (40.8) | 134 (18.4) | 0.001 |
| Dialysis | 8 (3.6) | 0 | 0.001 |
| Glaucoma | 19 (7.9) | 53 (7.2) | 0.679 |
| History of stroke/TIA | 23 (9.6) | 9 (1.2) | 0.001 |
| Hypertension | 188 (78.3) | 419 (57.5) | 0.001 |
| Insulin use | 38 (15.8) | 33 (4.5) | 0.001 |
| Pulmonary disease | 36 (15.0) | 69 (9.4) | 0.059 |
| Smoking | 42 (17.5) | 126 (17.3) | 0.946 |
| RCRI score | 0.001 | ||
| 0 | 107 (48.2) | 553 (87.8)c | |
| 1 | 73 (32.9)c | 66 (10.9) | |
| 2 | 36 (16.2)c | 7 (1.2) | |
| 3 | 6 (2.7)c | 1 (0.2) | |
| ASA physical status classification | 0.001 | ||
| I | 0 | 68 (9.4)c | |
| II | 156 (65.0) | 605 (83.3) | |
| III | 84 (35.0)c | 52 (7.2) | |
| IV | 0 | 1 (0.1) | |
Abbreviations: ASA, American Society of Anesthesiologists; RCRI, Revised Cardiac Risk Index; TIA, transient ischemic attack.
a
Data are expressed as median (interquartile range).
b
Data are expressed as mean (SD).
c
P-value≤0.05.