Table 2.

Comparison of linear trends of CM among all women at a delivery admission to women with CM who did not also have the listed pre-existing medical condition during the years 2000 – 2009 by linear regression (significance defined as P-value < 0.01). See Figure S3 for graphical representation.

Condition	aSlope	R2	P-value	bP-value comparing condition slope to CM
Cardiomyopathy (CM)	0.021	0.90	<0.001	--
CM without Congenital heart disease	0.021	0.89	<0.001	0.97
CM without Valvular heart disease	0.021	0.93	<0.001	0.91
CM without Conduction disorders	0.019	0.90	<0.001	0.52
CM without History of ischemic heart dz.	0.021	0.89	<0.001	0.97
CM without Asthma	0.020	0.86	<0.001	0.76
CM without Disorders of pulmonary circ.	0.200	0.87	<0.001	0.92
CM without Diabetes	0.019	0.85	<0.001	0.60
CM without Thyroid disorders	0.021	0.90	<0.001	0.95
CM without SLE	0.021	0.89	<0.001	0.93
CM without Rheumatoid arthritis	0.021	0.89	<0.001	0.89
CM without Thrombophilia	0.021	0.88	<0.001	0.98
CM without Thrombocytopenia	0.021	0.89	<0.001	0.99
CM without Anemia	0.017	0.85	<0.001	0.27
CM without Tobacco use	0.019	0.87	<0.001	0.72
CM without Drug use	0.020	0.90	<0.001	0.96
CM without Alcohol use	0.021	0.89	<0.001	0.88
CM without Chronic renal failure	0.020	0.87	<0.001	0.92
CM without Preeclampsia	0.015	0.80	<0.001	0.120
CM without Gestational diabetes	0.021	0.85	<0.001	0.92
CM without Multiple gestation	0.020	0.87	<0.001	0.83
CM without Fetal growth restriction	0.021	0.87	<0.001	0.96
CM without Placental abruption	0.021	0.89	<0.001	0.99
CM without Fetal death	0.021	0.89	<0.001	0.94

^aSlope (Δy/Δx) reported is the change in the listed condition per 1000 deliveries (Δy) per year (Δx) (Figure 2 and Figure S3)

^bComparison of the slope obtained from the linear regression of the trends for CM among all women to the slope obtained from linear regression for women with CM who did not also have each of the listed variables (women with CM who do not have the condition listed).