Correlation coefficient Spearman’s rho   P-value
Amplitude on stroke side 0.154 0.426
Inter-hemispheric phase shift 0.430 0.028
Absolute inter-hemispheric phase shift -0.099 0.631
Inter-hemispheric amplitude ratio 0.062 0.762
Absolute inter-hemispheric amplitude ratio -0.017 0.933
Inter-hemispheric cross correlation -0.165 0.393
Table 3: Correlation between NIH stroke scale (NIHSS) values at admission and low frequency oscillation variables. P values: Spearman’s correlation.