Figure 2From: Severe and early quadriceps weakness in mechanically ventilated patientsReproducibility of quadriceps twitch tension (Twq) measurements in sedated versus awake conditions. (A) Linear regression between Twq measured in sedated versus awake conditions in mechanical ventilation patients (Spearman coefficient correlation, r = 0.93, P = 0.02). (B) Bland-Altman comparison of sedated and awake Twq measurements. Limits of agreement (reference range of differences) were -1.18 and 0.98 kg. The means bias was -0.13 kg with a standard deviation of 0.47 kg.Back to article page