| Value | Category |
|---|---|
| A | Have only one sex partner |
| A G | |
| A F | |
| A E | |
| A EF | |
| A D | |
| A D F | |
| A DE | |
| A DEF | |
| A C | |
| A C F | |
| A CD | |
| AB | |
| AB F | |
| AB E | |
| B | Abstain from sex |
| B F | |
| B E | |
| B EF | |
| B D | |
| B DE | |
| BC | |
| BC F | |
| C | Always use condoms |
| C F | |
| C E | |
| C EF | |
| CD | |
| CDEF | |
| D | Trusted sexual partner |
| D G | |
| D F | |
| DE | |
| DEF | |
| E | Avoid blood transfusions |
| EF | |
| F | Use only disposable injection syringe |
| G | Other |
| X | Don't Know |