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. Author manuscript; available in PMC: 2020 May 24.
Published in final edited form as: Crit Care Med. 2019 Mar;47(3):360–368. doi: 10.1097/CCM.0000000000003590

Figure 2:

Figure 2:

Whisker Plots Demonstrate Linear Trends in Hospital Risk-Adjusted Outcome Rates Across Hospital MV Volume Quartiles. Hospital risk-adjusted outcome rates were calculated using multivariable hierarchical models with the hospital as a random intercept. Hospital risk-adjusted outcome rates were compared across hospital MV volume quartiles using linear regression. Higher hospital MV volume quartiles had higher hospital risk-adjusted rates of the hospital death (p=0.007, Panel A) and tracheostomy (p=0.009, Panel B). Higher hospital MV volume quartiles had lower risk-adjusted rates of 30-day readmission among survivors (p=0.003, Panel C). For all outcomes, pairwise comparisons between quartiles was made with ANOVA testing with Tukey’s adjustment and the only statistically significant pairwise comparison was between Quartile 4 and Quartile 1. Abbreviations: MV – mechanical ventilation.