Erratum to: Lung (2012) 190(6):635–643 DOI 10.1007/s00408-012-9423-7

In Fig. 2 on page 638 of the original publication of this article, the overall P values were misprinted for the middle and lower panels. The middle panel should read “Overall P = 0.055” and the lower panel should read “Overall P = 0.027”. The P values were correctly printed in the text and in Table 4. The corrected version of Fig. 2 is shown here.

Fig. 2
figure 2

Duration of mechanical ventilation (a), ICU length of stay (b), and P/F ratio at 24 h (c) according to pulmonary arterial pressure group. The box plot illustrates the minimum, lower quartile, median, upper quartile, and maximum values for each group. Asterisk represents outliers. P values are calculated using the Kruskal–Wallis one-way analysis of variance. Post-hoc pair wise comparisons were adjusted by a Bonferroni correction. ICU intensive care unit; ns not significant; P/F ratio PaO2/fraction of inspired O2 ratio; PHT pulmonary hypertension