Fig. 2From: Effect of an enteral amino acid blend on muscle and gut functionality in critically ill patients: a proof-of-concept randomized controlled trialTwitch airway pressure (cm H2O) in the amino acid and placebo groups. Twitch airway pressure was measured following magnetic stimulation over the spinal processes between C5 and C7. Values reported are mean changes from baseline at days 7, 14, 21 and 60, using a restricted maximum likelihood (REML)-based repeated measures approach. P < 0.05 at V4Back to article page