2.7. Statistical Analysis
Statistical analysis was performed using Sigma Plot 12.0 (Systat Software GmbH, Schimmelbuschstraße 25, 40699 Erkrath, Germany). The intra-individual analysis (i.e., comparison between baseline values and values after 6 electrotherapy sessions), as well as inter-individual analysis (i.e., comparison between the three groups) were performed using the paired 