Comparison of preoperative demographic data between groups
| Laser group (n=3289) | Manual group (n=2130) | |||||
| Subgroup A (n=250) | Subgroup B (n=250) | Subgroup C (n=250) | Subgroup D (n=2539) | Total laser group (n=3289) | ||
| Mean age (y)±SD (range) | 65.63±14.68 (18-93) | 65.77±12.80 (33-99) | 65.49±13.17 (14-89) | 66.63±12.91 (8-95) | 66.40±13.07 (8-99) | 66.96±12.52 (15-98) |
| Female sex, no. (%) | 150 (60.00) | 136 (54.40) | 126 (50.40) | 1530 (60.30) | 1942 (59.05) | 1204 (56.53) |
| Mean nuclear sclerosis±SD | 2.39±0.92 | 2.38±0.89 | 2.34±0.87 | 2.36±0.88 | 2.36±0.88 | 2.36±0.90 |
| Grade 1, no. (%) | 42 (16.80) | 37 (14.80) | 35 (14.00) | 380 (14.97) | 494 (15.02) | 365 (17.14) |
| Grade 2, no. (%) | 97 (38.80) | 110 (44.00) | 121 (48.40) | 1131 (44.55) | 1459 (44.36) | 861 (40.42) |
| Grade 3, no. (%) | 88 (35.20) | 79 (31.60) | 73 (29.20) | 796 (31.35) | 1036 (31.50) | 712 (33.43) |
| Grades 4 and 5, no. (%) | 23 (9.20) | 24 (9.60) | 21 (8.40) | 232 (9.14) | 300 (9.12) | 192 (9.01) |