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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Am Heart J. 2011 Mar;161(3):567–573. doi: 10.1016/j.ahj.2010.12.009

Figure 1.

Figure 1

Restricted cubic spline analysis for Cox proportional hazards model, in patients with heart failure with mild-to-moderate left ventricular systolic dysfunction (LVSD), showing A. significantly increased all-cause mortality for systolic blood pressure (SBP) below 120 mm Hg and above 150 mm Hg in External Peer Review Program (EPRP) database and B. significantly increased mortality for SBP below 110 mmHg and a non-significant increase above 150 mmHg in Digitalis Investigation Group (DIG) trial. Solid line represents the estimated logarithmic hazard ratio of all cause mortality with 95% pointwise confidence band represented by broken lines.