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was 280 nr (SO ± 166 ml.) and 215 ml (SO ± 98 ml.)
respectively (p=O .Ol). There was a lso a statistically
important d ifference in the ch a nges t hat occurred in t he
haemog lobin leve l s a f t er delivery i n the s e SUbjects a nd the i r
mean h aemoglob i n levels before and after de livery were 12 .0
g/dl (SO ± 0 .8 g/dl) and 9 .9 g/ d l ( SO ± 1.2 g/dI) r e s pe c t i ve l y
(p=O .Ol) •
For t hese SUbjects t herefore t heir anaemia can clearly be
attributed mos tly to the events a t the time o f labour.
POSTPART UM HYPERTENSION
The 35 i ndividuals who we r e found to have postpartum
hypertension at follow up , were compared to those who had
normal blood pressures to i dentify possible risk factors.
Univariate a nalysis revealed no s tatistical diff e r e nce!" i n the
distribut ions of t he socio-demographic variables of age, a nd
ed ucation in t hose SUbjects who had hypertension as co mpared
to t hose who had normal blood pressures.
The distribution of SUbjects by ethnic groups howe ve r
differed statistically (p=O ,02 ) . The difference was clearly
due t o t he i ncreased proportion of SUbjects of northern e t hnic
origins in the hypertensive group; 40.0\ as opposed t o 11 .4\
i n the no n-hypertensive gro up . The RR for postpartum
hypertension in SUbjects wi th northern ethnic origin was 2.75