From:  Right ventricular echocardiographic parameters predict severe sleep apnea syndrome in patients with heart failure
 

Multivariate analysis

Parameterp-valueHR95% CI
Right ventricular fractional area change0.0810.9440.884–1.007
Right ventricular free wall longitudinal strain0.0360.8920.816–0.979
Right ventricular Tei index0.6691.0370.975–1.103
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HR: hazard ratio