Heart rate variability results of Experiment 3.

<p>The acoustic stimuli decreased all heart rate variability parameters compared to silence except the LF/HF ratio, thus reproducing the results of Experiment 1 and 2. Note the generally similar results of healthy subjects and Crohn′s disease patients. This demonstrates that Crohn′s disease is not per se characterized by a different autonomic tone or autonomic reactivity. <i>Lg</i>: indicates logarithmized data where transformation was applied; <i>Pleasant</i>: pleasant music; <i>Unpleasant</i>: music-like noise; *: <i>p</i> < .05; **: <i>p</i> < .01; ***: <i>p</i> < .001. For description of HRV parameters see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0126224#pone.0126224.t001" target="_blank">Table 1</a>.