Centre for Longitudinal Studies

Appendix 10

Result of manual scrutiny of all ‘true’ NCDS multiple births (i.e.
where birth outcomes separated by no more than 3 days).

The following 117 cases had ‘true’ multiple outcomes. All were examined manually.
16 were problematic (see table below), of which 13 were altered (column ‘Ch?’=C).

All other cases were correctly entered.

Nserial   Ch?Comments
043013C C Double miscarriage, with one other livebirth in wrong order

044001A C Double miscarriage, with single miscarriage & three other livebirths in wrong order

183016T C Twins bunched with single birth, wrong order. Delete pre-March 91 twins.

188030P C Miscarriage, then twins seven months later, wrong order: assume same pregnancy

500219V C Double miscarriage, but placed in separate pregnancies. Move to same pregnancy

500015C C Twins born on separate days entered in wrong order chronologically.

509254W C Twins born on separate days entered in wrong order chronologically.

620019H Two miscarriages in same year, sep. pregnancies: day and month not stated. Leave as is.

730084J C Twins entered correctly, but one other outcome entered out of chronol.order.

850027R Miscarriage, then twins five months later: assume same pregnancy, so leave as is.

950290Q C Miscarriage+double miscarriage 6 months later, then twins 1 month after that(?!), wrong order.

980004E C Miscarriage, then twins seven months later. Assume same pregnancy, but change order

986100J C Double miscarriage, wrongly bunched with miscarriage 4 years earlier

X38008Q C Twins entered as though in two separate pregnancies

Y00174D C Double miscarriage, entered as though two separate pregnancies

Y00293N Miscarriage, then twins six months later: assume same pregnancy, so leave as is.

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