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( e l 1. 4 0 to S.14) with a signif icant p - valu e o f 0 .002. See
AP PENDI X L.
oc cupatio n also diff e r ed s ignifi c antly be tw e en the t wo
g roups (p "'O. 003 ) but t h i s d ifference was g e neralised a nd co uld
no t be attri buted to any pa rticular oc c upati on. A pos s i b l e
e xp l an ation for t his s t a t ist ical differe nce ma y be that ,
becaus e the total number o f hypertensive s is sma l l, and t he
occu pat i ons a r e d i v i ded i nto s e ve n catego r i es , t he total
nu mbe r o f sUbject s i n each cell i s s mal l a nd ther e f o re r esult s
i n a s i gnific a nt va riation .
parit y wa s not fou nd t o be a s ignif i c an t risk factor , and
a ntena tal ca re did not diffe r i n t he two g r oups . A tot al o f 5
SUbj ects we re no t ed t o have a hyp erte ns ive disorder prior t.e
de live ry , and two of these SUbjects were round t o be still
hyperte nsive at follow-up. Pr eg nan c y hyperte ns i on however was
no t f ound i n t h i s sample t o be a stati stically s igni fic a nt
risk factor fo r postpartum hyper t en sion (p-O.07) ev e n t hough
the RR f o r post pa r tum hy pe r t ension, if a SUbject had p r e ­
deliv e ry h¥ P!ilrt en s ion. was 4. 29 .
Labo u r ex pe rie nce s in tenns of t h e t ot a l duration of
l a bou r, t ype of do livery a nd co mpl i cations were no t fou nd t o
be assoc i ated with t he oc cu r r e nce of postpa r t um hypert e nsio n .
A mul t iple bLt't h was not a r isk f ac t or for t hi s postpartum
hyperten s i on i n t:hls stUdy popu La tiLon , Se e APPENDI X L.