| Characteristic | Value |
| Total number of patients | 198 |
| Sex |
|
| Male (%) | 145 (73.2%) |
| Female (%) | 53 (26.8%) |
| Age (years), range (mean) | 23 - 90 (46) |
| Boey score |
|
| 0 | 129 |
| 1 | 52 |
| 2 | 13 |
| 3 | 4 |
| Site of perforation |
|
| Prepyloric area | 71 |
| Duodenal bulb | 127 |
| Type of operation (number of patients) |
|
| Lap Graham patch | 179 |
| Lap Taylor | 19 |
| Operative time (min), range (mean) |
|
| Lap Graham patch | 40 - 100 (65) |
| Lap Taylor | 120 - 155 (143) |
| Conversion (number of patients) | 4 |