Skip to main content
. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: BJOG. 2014 Mar 25;121(11):1386–1394. doi: 10.1111/1471-0528.12726

Figure 2. Trends in the prevalence of cardiomyopathy in women without hypertensive disorders of pregnancy compared to all women with cardiomyopathy at delivery admissions, the 2000 – 2009 Nationwide Inpatient Sample (n=43,226,239).

Figure 2

Error bars demonstrate 95% confidence intervals. To determine if pre-existing medical conditions or medical and obstetric complications occurring during a delivery admission were accounting for the increased prevalence of cardiomyopathy over the study period, the linear trend for cardiomyopathy among women who also did not have each of the preexisting medical conditions or medical and obstetrics complications listed (Tables 2 and 3) were compared to the linear trend for all women with cardiomyopathy. A. The difference in the slopes for the linear trends of all women with cardiomyopathy compared to women with cardiomyopathy who did not have chronic hypertension were significantly different (p=0.005), suggesting that chronic hypertension was contributing to the increasing prevalence of cardiomyopathy during the study time period. B. and C. In contrast, there were no differences in the slope for linear trend among all women with cardiomyopathy compared to women with cardiomyopathy who did not have preeclampsia (B) or compared to women with cardiomyopathy who did not have both chronic hypertension and preeclampsia (C). (Abbreviations: CM=cardiomyopathy, HTN=hypertension, Prex=preeclampsia)