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The following
assumptions were accepted:
- The additional risk for the infant to die when born to mothers whose
pregnancies were unintended was assumed to be the same for Pierce County
as it was found for the U.S.;
- One third of all cases of Hepatitis B infection was assumed to be
sexually transmitted;
- Two thirds of all HIV cases were assumed to be sexually transmitted;
- 100% of all cases of cervical cancer were suggested to be sexually
transmitted;
- 100% of all cases trichomoniasis, syphilis and other venereal diseases
were suggested to be sexually transmitted;
- The proportion of additional bed-days and outpatient visits associated
with the additional risk of death among those infants who were born to
mothers whose pregnancies were unintended was assumed to be the same as
for the risk of death for those infants, that is, equal to 12.5%.
- Data pertaining to outpatient visits from hospitals in Pierce County
was unavailable at the time of this study. To reconstruct this data, it
was assumed that Regence Washington Health data covering 9.5% of
the Pierce County population provide a reasonably fair picture of the
percent morbidity in Pierce County. So, the estimates for Pierce County
population were obtained by multiplying the Regence data by 1/0.095 =
10.5.
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