Fig. 3From: Reliability of ultrasound measurements of quadriceps muscle thickness in critically ill patientsEvolution of Quadriceps femoris muscle thickness between D1 and D21. *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001 (comparison with D1 assessment). Values are represented by medians and 95% confidence intervalBack to article page