Understanding Society User Support

Hello Lydia,

Many thanks for your enquiry. The Understanding Society team is looking into it and we will get back to you as soon as we can.

Best wishes,
Alita

Dear Lydia,

There is a variable available in Waves 14 and 16 of BHPS, bw_hlpreg, which you could use, but there are also some other methods which you could use to identify people who were pregnant:

1) Child age in months, bw_bwtagm1-3 in bw_indresp, is available from Wave 10 onwards, so this could be used along with the previous interview date.

2) Using the bw_egoalt file, if the variable bw_lwstat has a value of 3 "alter birth", it means that the alter entered the survey through birth, so the mother may have been pregnant in the last interview. The relationship (bw_rel=4 or bb_relationship_bh=9) can also be used to check if the ego for that record is the mother.

3) Using bw_indall, identify children of the respondents using mother identifiers (bw_mnpid_bh for mother's pid) attached to children and then check the age of the children.

4) The birth year (and month in Special Licence) of the respondent's first child is available in ch1by (and ch1bm) in xwavedat – coupled with interview dates.

Best wishes,
Stephanie