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Table 2 Association between oxygen therapy and clinical outcomes in normoxemic patients with AHF

From: Is oxygen therapy beneficial for normoxemic patients with acute heart failure? A propensity score matched study

Clinical outcomesa Ambient Air Oxygen Therapy OR (95% CI) P value
Pre-matched cohort n = 1692 n = 1230   
 All-cause in-hospital mortality [n (%)]
  Univariable logistic model 104 (6.1) 98 (8.0) 1.32 (0.99–1.76) 0.056
  Multivariable logistic model 104 (6.1) 98 (8.0) 1.34 (0.98–1.84) 0.067
 All-cause ICU mortality [n (%)]
  Univariable logistic model 42 (2.5) 43 (3.5) 1.42 (0.92–2.19) 0.109
  Multivariable logistic model 42 (2.5) 43 (3.5) 1.58 (0.97–2.56) 0.066
 Length of ICU stay (days) 2.2 (1.5–3.5) 2.7 (1.8–4.6) 1.15 (1.11–1.19) < 0.001
 Length of hospital stay (days) 6.5 (4.0–11.3) 7.8 (4.8–13.1) 1.07 (1.04–1.11) < 0.001
Post-matched cohort n = 1122 n = 1122   
 All-cause in-hospital mortality [n (%)]
  Univariable logistic model 74 (6.6) 89 (7.9) 1.22 (0.89–1.68) 0.223
  Multivariable logistic model 74 (6.6) 89 (7.9) 1.30 (0.92–1.82) 0.138
 All-cause ICU mortality [n (%)]
  Univariable logistic model 34 (3.0) 40 (3.6) 1.18 (0.74–1.88) 0.479
  Multivariable logistic model 34 (3.0) 40 (3.6) 1.39 (0.83–2.32) 0.206
 Length of ICU stay (days) 2.2 (1.5–3.8) 2.7 (1.7–4.4) 1.11 (1.06–1.15) < 0.001
 Length of hospital stay (days) 6.8 (4.1–11.2) 7.6 (4.6–12.9) 1.06 (1.01–1.10) 0.009
  1. aValues are n (%) or median (interquartile range). AHF acute heart failure, ICU intensive care unit, OR odds ratio, CI confidence interval