Table 3 Subgroup analysis of immediate postoperative pain and cooperation scores between the study groups
Control group, n (%) | Lidocaine group, n (%) | p† | |
|---|---|---|---|
Subgroup: Nuclear cataract 1–3 | |||
n = 70 | n = 61 | ||
Immediate postoperative pain | < 0.001 | ||
- No pain | 10 (14.3) | 28 (45.9) | |
- Mild | 47 (67.1) | 31 (50.8) | |
- Moderate | 11 (15.7) | 2 (3.3) | |
- Severe | 2 (2.9) | 0 (0) | |
Cooperation score* (Median [IQR]) | 0 (0, 1) | 0 (0, 1) | 0.402 |
- Score difference (95% confidence interval) | −0.10 (− 0.34, 0.14) | ||
Subgroup: Mature cataracts | |||
n = 18 | n = 27 | ||
Immediate postoperative pain | 0.208 | ||
- No pain | 4 (22.2) | 10 (37.0) | |
- Mild | 13 (72.2) | 17 (63.0) | |
- Moderate | 1 (5.6) | 0 (0) | |
- Severe | 0 (0) | 0 (0) | |
Cooperation score* (Median [IQR]) | 1 (0, 2) | 0 (0, 1) | 0.016 |
- Score difference (95% confidence interval) | −0.82 (− 1.47, − 0.16) | ||
Subgroup: Second-eye operation | |||
n = 26 | n = 26 | ||
Immediate postoperative pain | 0.022 | ||
- No pain | 4 (15.4) | 10 (38.5) | |
- Mild | 17 (65.4) | 16 (61.5) | |
- Moderate | 4 (15.4) | 0 (0) | |
- Severe | 1 (3.8) | 0 (0) | |
Cooperation score* (Median [IQR]) | 0 (0, 1) | 0 (0, 1) | 0.495 |
- Score difference (95% confidence interval) | −0.15 (− 0.60, 0.30) | ||
Subgroup: Prolonged operation‡ | |||
n = 11 | n = 14 | ||
Operative time (minutes) (Median [IQR]) | 25 (24, 28) | 25 (23, 33) | |
Immediate postoperative pain | 0.239 | ||
- No pain | 1 (9.1) | 4 (28.6) | |
- Mild | 7 (63.6) | 9 (64.3) | |
- Moderate | 3 (27.3) | 1 (7.1) | |
- Severe | 0 (0) | 0 (0) | |
Cooperation score* (Median [IQR]) | 2 (1, 2) | 0 (0, 1) | 0.006† |
- Score difference (95% confidence interval) | −1.14 (− 1.92, -0.35) | ||