| approach/type | NE | % | FJ | % | total | P value (chi-square) 0.995 |
| Transthoracic | 3 | 25% | 3 | 23% | 6 | 24% |
| Transhiatal (2 field) | 4 | 33.33% | 5 | 38.46% | 9 | 36% |
| 3 field | 2 | 16.66% | 2 | 15.38% | 4 | 16% |
| Abdominal | 3 | 25% | 3 | 23% | 6 | 24% |
| TOTAL | 12 | 48% | 13 | 52% | 25 | 100% |