Clinical outcome in two groups
| Variable | Recanalisation of nasolacrimal duct obstruction | External dacryocystorhinostomy | |
| n (%) | n (%) | ||
| Primary surgery | 506 (100.0) | 135 (100.0) | p* |
| Full success | 440 (86.96) | 118 (87.41) | |
| Partial success | 31 (6.13) | 5 (3.70) | |
| Total success | 471 (93.08) | 123 (91.11) | |
| Failure | 35 (6.92) | 12 (8.89) | |
| Second surgery | 27 (100.0) | 10 (100.0) | p† |
| Full success | 20 (74.07) | 4 (40.0) | |
| Partial success | 3 (11.11) | 0 (0) | |
| Total success | 23 (85.19) | 4 (40.0) | |
| Failure | 4 (14.81) | 6 (60.0) |
*p = 0.816, two-sample t test (a = 0.05).
**p = 0.013, two-sample t test (a = 0.05).