Centre for Longitudinal Studies

Appendix 7

NCDS cases where two birth outcomes are separated by more than
three days, but less than 9 months.

Y31043N

133 cases in total.

On manual scrutiny, 62 of these were plausible, e.g. two miscarriages seven months
apart, listed in separate pregnancies.

However, the following 71 cases were problematic in some way or other. The middle
column contains a ‘C’ if the case record was changed by this cleaning exercise.

nserial Ch?Comments

Miscarriage 1992 (no month), abortion July 92, in same pregnancy. Assume OK.

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

C Live birth with miscarriage 6 months later (i.e. OK), also still pregnant, but order wrong

C Two live births 2 weeks apart, different pregnancies, & order wrong. Move to same pregnancy

C Chronological order completely confused

C Two live births a month apart, and wrong order, but both pre-1991 anyway, so delete.

C Two live births a fortnight apart, placed in separate pregnancies. Move to same preg.

C Stillbirth eight days after live birth. OK, but order wrong

Miscarriage, then live birth 6 months later, same pregnancy. Assume OK.

Two miscarriages 4 months apart, sep.pregnancies. Assume OK, but order is wrong
Order wrong, involving stillbirth and live birth and one separate pregnancy.

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