Population attributable risk percent (PAR %) for the listed outcomes among women age 45 and older compared to women under age 45.[17].

aPopulation attributable risk percent was calculated using the equation: PAR = Pe (RRe–1)/[1+ Pe (RRe–1)], where PAR = Population attributable risk, Pe = prevalence of the exposure, and RRe = relative risk of disease due to the exposure.[17] The exposure group is pregnant women 45 and over and the comparison group is all pregnant women at delivery age less than 45.
bThere were less than 10 subjects with stroke/cerebrovascular disorders among women age 45 and older. The NIS does not allow the reporting of the number of subjects of any cell with 10 or less subjects, thus a PAR% value was not calculated.
Pregnancies to women aged 45 and older represented 0.19% of all deliveries in the years 2008–2010.