“…Figure 4 gives a representation of the statistical methods used in the included studies. Forty-five studies included between-or within-group comparisons using statistical tests [12, 13, 28, 47, 51, 55, 58-60, 62-65, 69, 70, 73, 75, 79, 80, 85, 89, 90, 92-94, 96-98, 102, 104, 105, 109, 111, 114, 117, 123, 124, 131, 134, 137, 140-142, 144], mainly parametric and non-parametric ANOVA and parametric and non-parametric t-tests, whereas 43 studies used machine learning [15, 29, 48, 49, 53, 55-57, 62, 63, 66, 67, 72, 74-78, 81-84, 86-89, 100, 102, 112, 113, 115, 118-120, 122, 126, 129, 132, 133, 135, 136, 139, 144]. Twenty-five studies evaluated correlation of sensor features with clinical scales [12, 28, 51, 52, 54, 59, 60, 65, 70, 71, 80, 93, 103, 106-108, 110…”