| No. | Name of Lifestyle | Third Class | Second Class | First Class | Type | No. of Studies |
|---|---|---|---|---|---|---|
| 1 | Vasectomy History+BRCA+ | NA | Vasectomy+gene | Joint effect | No statistical significance factor | 1 |
| 2 | Vasectomy History+BRCA- | NA | Vasectomy+gene | Joint effect | No statistical significance factor | 1 |