Fig. 2From: Stress responses in surgical trainees during simulation-based training courses in laparoscopyThe boxplots of the median of LF/HF-ratio (a), RMSSD (b), SDNN (c) and SD2/SD1 ratio (d) data for 24 participants in resting conditions and during simulation-training activity on three simulators, the D-box, P.O.P. trainer and LAPMentor™. Data are presented as the median, minimum and maximum values, 25% and 75% quartiles, and · = outliersBack to article page