Table 3.
Differences between two subgroups of patients who underwent bilateral sequential cataract surgery.
| Parameter | More pain (n = 31) | Same or less pain (n = 22) | P value |
|---|---|---|---|
| Mean age (y) ± SD | 71 ± 11 | 66 ± 8 | 0.073 |
| Gender (male/female) | 11/20 | 11/11 | 0.300 |
| Median pain (range) | |||
| VAS-pain | 2 (1, 8) | 1.5 (0, 4) | 0.032∗ |
| Wong-Baker Faces Pain Rating Scale | 2 (0, 6) | 2 (0, 6) | 0.003∗ |
| Median value of anxiety (range) | |||
| STAI | 6 (6, 24) | 9.5 (6, 17) | 0.566 |
| VAS anxiety | 1 (0, 8) | 1.5 (0, 5) | 0.293 |
| Median cataract (range) | |||
| Nuclear | 3 (2, 3) | 3 (2.5, 4) | 0.260 |
| Cortical | 0 (0, 1) | 0 (0, 1) | 0.513 |
| Posterior subcapsular | 0 (0, 1) | 0 (0, 1) | 0.807 |
| Mean operating room time (min) ± SD | 10 ± 2 | 10 ± 4 | 0.831 |
| Mean phacoemulsification time (min) ± SD | 0.7 ± 0.3 | 1 ± 0.8 | 0.061 |
| SBP/DBP (mmHg) ± SD | |||
| Preoperative | 147 ± 21/82 ± 11 | 145 ± 25/83 ± 14 | 0.760/0.815 |
| Intraoperative | 153 ± 23/85 ± 13 | 155 ± 22/89 ± 14 | 0.769/0.335 |
| Postoperative | 146 ± 23/79 ± 13 | 140 ± 22/78 ± 15 | 0.326/0.640 |
| Mean arterial pressure (mmHg) ± SD | |||
| Preoperative | 104 ± 13 | 103 ± 17 | 0.959 |
| Intraoperative | 108 ± 15 | 110 ± 16 | 0.660 |
| Postoperative | 102 ± 15 | 99 ± 15 | 0.451 |
| Heart rate (bpm) ± SD | |||
| Preoperative | 76 ± 13 | 73 ± 15 | 0.418 |
| Intraoperative | 76 ± 12 | 76 ± 14 | 0.960 |
| Postoperative | 75 ± 11 | 71 ± 17 | 0.203 |
Mean arterial pressure = systolic pressure × 1/3 + diastolic pressure × 2/3.
∗Significantly different between the two groups (two-tailed Wilcoxon test).
SD, standard deviation; VAS, visual analog scale, STAI, State-Trait Anxiety Inventory; SBP, systolic blood pressure; DBP, diastolic blood pressure.