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1.5 g / d l) a nd 11.9 g/dl ( ± 1. 3 g/dl ) respectively (p< O.OOOl ).
The risk for postpartum anaemia in sUbjects who were anaemic
prio r to deliv e r y was 4 .31 (c r 2 . 72 to 6 . 74) (p p > 0 . 15) . Although the
proportion of pers ons with severe anaemia (l ess than 8 .0 g/d!)
a mong these s ub'[ects (54), also increased from 7 . 4\ (4 ) pre ­
partum to 18 .5 \ ( 10) postpartum, this i ncreased proport i on wa s
also not statistically signifi cant (p=O. 15 ) . Thus f or s Ub j ects
who were anaemic be f ore delivery, the del i very proc ess , did
not alter significantly t he i r po s tpartum haemoglobin s t a t us.
The small number of sucjeces who became s ev e r e l y anaemic after
delivery did not practically permit a futher detailed analysis
o f t his group.
Becaus e many of the baseline factors found on u niva riat e
a na l ys is to be s t a t ist ical l y s i g nifi ca nt risk factors for
po s tpartum anaemia are known to interact 10'1th each other a nd
are therefore likely t o c onf ou nd each other, a multivariate
l og i s t i c a na l ys i s was perf ormed using nine of these variables