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Distribution of pre-randomisation tidal volumes in the Acute Respiratory Distress Syndrome Network Lower Tidal Volume (ARMA) trial
PBW = predicted body weight. The figure shows the frequency of pre-randomisation tidal volumes (mL/kg PBW) in the ARMA trial. The tidal volumes prescribed by physicians before randomisation in the ARMA trial were normally distributed. Figure reproduced, with permission, from Deans et al.17
