| Open surgery | Percutaneous nephrolithotomy | |
---|
Association between type of surgery and surgical outcome, disregarding kidney-stone size |
Failure | 77 | 61 | |
Success | 273 | 289 | |
Total | 350 | 350 | |
Percentage success | 78% | 83% | Positive association |
| Large stone | Small stone | |
---|
Open surgery | Percutaneous nephrolithotomy | Open surgery | Percutaneous nephrolithotomy |
---|
Association between type of surgery and surgical outcome for each kidney-stone size |
Failure | 71 | 25 | 6 | 36 | |
Success | 192 | 55 | 81 | 234 | |
Total | 263 | 80 | 87 | 270 | |
Percentage success | 73% | 69% | 93% | 87% | Negative associations |
- Surgical outcome coded 0 = failure, 1 = success; type of surgery coded 0 = open surgery, 1 = percutaneous nephrolithotomy; kidney-stone size coded 0 = large stone, 1 = small stone