| Value | Category |
|---|---|
| 0 | Not using |
| 1 | Pill |
| 2 | IUD |
| 3 | Injections |
| 4 | Foam, jelly, diaphr. |
| 5 | Condom |
| 6 | Female sterilization |
| 7 | Male sterilization |
| 8 | Periodic abstinence |
| 9 | Withdrawl |
| 10 | Other |
| 11 | Implants / Norplant |
| 13 | Calen., Rythm, Ogino |
| 14 | Temperature |
| 15 | Mucus, Billing |