Figure 2.

Practice variation expressed on the scales of the ventilator settings. Individual data points are the hospital unconditional means after adjusting for covariates. The interval bounds are model-based estimates of the 2.5 and 97.5 percentiles of the random effects, which represent the between-ICU variability in mean ventilator setting after adjusting for covariates and discounting random variance. The number of included patients is shown for each variable for each time point. PEEP = positive end-expiratory pressure.