Available from 2006 onwards. Expected date of confinement [edcdate] Full date will only be supplied if sufficient justification is supplied that gestational age is insufficient. Previous pregnancy >20 weeks Available from 1994 onwards. 0 = No gestation? 1 = Yes Previous pregnancy greater than 20 gestation 9 = Not stated [prevpreg] Number of previous Available from 1994 onwards. pregnancies [pregnum] Number of previous pregnancies greater than 20 weeks gestation Was last birth by caesarean Available from 1998 onwards. 0 = No section? 1 = Yes [csbirth] 9 = Not stated Total number of previous Available from 1998 onwards. caesarean section [cstotal] Amniocentesis (<20 weeks) Available from 1994 to 2006. 0 = No [oamn] 1 = Yes 9 = Not stated CVS (<20 Available from 1994 to 2006. 0 = No [ocvsonly] 1 = Yes Chorionic villus sampling. 9 = Not stated Cervical suture Available from 1994 to 1997. 0 = No [OCS] 1 = Yes Cervical suture? 9 = Not stated Antenatal care Available from 2006 onwards. 0 = No [anc] 1 = Yes Was antenatal care received? 9 = Not stated
Expected date of confinement [edcdate] Available from 2006 onwards. Full date will only be supplied if sufficient justification is supplied that gestational age is insufficient. Previous pregnancy >20 weeks gestation? [prevpreg] Available from 1994 onwards. Previous pregnancy greater than 20 gestation 0 = No 1 = Yes 9 = Not stated Number of previous pregnancies [pregnum] Available from 1994 onwards. Number of previous pregnancies greater than 20 weeks gestation Was last birth by caesarean section? [csbirth] Available from 1998 onwards. 0 = No 1 = Yes 9 = Not stated Total number of previous caesarean section [cstotal] Available from 1998 onwards. Amniocentesis (<20 weeks) [oamn] Available from 1994 to 2006. 0 = No 1 = Yes 9 = Not stated CVS (<20 [ocvsonly] Available from 1994 to 2006. Chorionic villus sampling. 0 = No 1 = Yes 9 = Not stated Cervical suture [OCS] Available from 1994 to 1997. Cervical suture? 0 = No 1 = Yes 9 = Not stated Antenatal care [anc] Available from 2006 onwards. Was antenatal care received? 0 = No 1 = Yes 9 = Not stated
pdc_data_dictionary_feb2018_pr.docx