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"Variable Name","Variable ID","Variable Description",Version,"dbGaP Mapping" PX100402_Difficulty_Getting_Pregnant_Current_Duration_Contraception_Last_Use_Month,PX100402010100,"When did you last use contraception? Month",,https://www.phenxtoolkit.org/protocols/view/100402 PX100402_Difficulty_Getting_Pregnant_Current_Duration_Contraception_Last_Use_Year,PX100402010200,"When did you last use contraception? Year",,https://www.phenxtoolkit.org/protocols/view/100402 PX100402_Difficulty_Getting_Pregnant_Current_Duration_Number_Months_Without_Contraception,PX100402020000,"Calculate the number of months of unprotected intercourse from the time contraception last used til the date of the interview. Round up number of months",,https://www.phenxtoolkit.org/protocols/view/100402