Women currently using a contraceptive method (V312 <> 0)
Imputation and derivation
Derivation
If the respondent gave the method start date as before her last birth, the months usage is calculated as the number of months since her last birth. Otherwise, it is calculated as V008 - V317 (date of interview minus the CMC method start date)
Others
Notes
If there is a calendar and V337 >= the length of the calendar, then V337 is set to 95.{a core}, 96 96+ {b core}, 997- Inconsistent, 998- Don't know