To examine operative risk factors for patients with perforated duodenal ulcers
The scoring system can predict mortality after open and laparoscopic surgery for perforated peptic ulcers
Major medical illness includes severe cardiac diseases, severe pulmonary disease, renal failure , diabetes mellitus and hepatic precoma
The mortality rate increases progressively with increasing numbers of risk factors: 0, 10, 45.5 and 100% in patients with none, one, two and all three risk factors respectively