“…Overall, the sample sizes ranged from 10 to 34,589 people. The populations consisted of 16 studies that looked at chronic LBP 19,20,24,28,29,31,36,37,39,42,[54][55][56][57]62,64 , two acute LBP 27,30 , one recurrent 22 , one lumbar spinal stenosis 21 , two surgical 46,61 , nine other (mixed samples) 35,38,40,41,48,51,53,65,66 and 17 were unclear (LBP type not defined) 23,25,26,[32][33][34][43][44][45]47,49,50,52,[58][59][60]63 . Ten studies did not report training and testing of the data sets 26,29,...…”