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Table 4 Logistic regression analysis of patients’ background factors associated with LVEF improvement when not including AHI

From: Adaptive servo-ventilation therapy using an innovative ventilator for patients with chronic heart failure: a real-world, multicenter, retrospective, observational study (SAVIOR-R)

Background factors Likelihood ratios Odds ratios
B SE Wald χ 2 a df P valueb Exp(B) 95 % Wald CI
Age (≥ 65 years) 1.850 0.907 4.163 1 0.041 6.362 (1.076–37.632)
CKD −2.842 1.011 7.904 1 0.005 0.058 (0.008–0.423)
LVEF at baseline (< 40 %) −0.066 0.027 5.741 1 0.017 0.936 (0.887–0.988)
  1. B coefficient for the logistic regression equation to predict the dependent variable from the independent variable, SE standard error around the coefficient, df degree of freedom for Wald χ 2 test, Exp(B) exponentiation of the B coefficient, an odds ratio, LVEF left ventricular ejection fraction, AHI apnea–hypopnea index, CI confidence interval, CKD chronic kidney disease
  2. aWald χ 2 statistic
  3. bA value of P < 0.05 was considered statistically significant