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Original Article

J Liaquat Uni Med Health Sci. 2010; 9(3): 125-129

Pregnancy with Obesity -A Risk Factor for PIH

Shabnam Shamim Asim, Humaira Naeem.

OBJECTIVE: To compare the frequency of pregnancy induced hypertension (PIH) between
obese and non-obese women.
STUDY DESIGN: Comparative study
PLACE AND DURATION OF STUDY: Antenatal Clinic and Obstetrics Ward of Abbasi Shaheed
Hospital, Karachi from 1st January 2008 to 30th June 2008.
METHOD: A total of two hundred gravid women were selected by non-probability purposive
sampling. Inclusion criteria were pregnant women with singleton pregnancy and gestational age
from 24 to 40 weeks.
Two groups were formed having hundred women each. Group A formed of non-obese (B.M.I90-mmHg or systolic pressure of >140-mmHg, two
readings 4 hours apart were diagnosed as PIH.
Frequency and percentage were computed for categorical variables like age groups, gravida,
family history, patients with pregnancy-induced hypertension. Chi-Square test was used to
compare proportion of patients with pregnancy-induced hypertension between obese and nonobese
women. Mean with standard deviation, 95% confidence interval of mean were also computed
for quantitative variables like age, parity, gestational age, height, weight, BMI, systolic
and diastolic blood pressure by applying t-test to compare mean difference between obese and
RESULTS: The frequency of PIH was found to be higher in obese women as compared to nonobese
patients. The overall PIH was 67 out of 200 (33.5%). PIH was present in 41% of obese
women and in 26% of non-obese women. P-value=0.025 indicate that pregnancy induced hypertension
was two times more likely in obese women than non-obese women (OR= 1.98, 95% CI=
1.09 to 3.59).
CONCLUSION: The results of this study indicate that frequency of PIH is higher in patients belonging
to group B who were obese.

Key words: Pregnancy induced hypertension, Body mass index, Obesity, Pregnancy.

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