Tetracaine group (n = 30) | Image group (n = 30) | P value | |||||
---|---|---|---|---|---|---|---|
Mild | Moderate | Severe | Mild | Moderate | Severe | ||
0.5 h | 16(53.3%) | 2(6.7%) | 0(0%) | 6 (20.0%) | 0 (0%) | 0 (0%) | 0.003 |
1 h | 16 (53.3%) | 6 (20.0%) | 0 (0%) | 4 (13.3%) | 2 (6.7%) | 0(0%) | 0.000 |
2 h | 10 (33.3%) | 6 (20.0%) | 0 (0%) | 2 (6.7%) | 0 (0%) | 0 (0%) | 0.000 |
6 h | 10 (33.3%) | 6 (20.0%) | 0 (0%) | 2 (6.7%) | 0 (0%) | 0 (0%) | 0.000 |