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Comparison of GI index values and respiratory system elastance in lung-healthy and ARDS groups. H_G, A_G: median of GI index values in both lung-healthy (H) and ARDS (A) groups; H_E, A_E: median of respiratory system elastance (Ers) in both lung-healthy (H) and ARDS (A) groups. The boxes mark the quartiles while the whiskers extend from the box out to the most extreme data value within 1.5*the interquartile range of the sample. *, p < 0.05; **, p < 0.01.
