Table 5 Correlation between commonly used actigraphy measures and recurrence plot measures .

From: Uncovering complexity details in actigraphy patterns to differentiate the depressed from the non-depressed

 

\(L_{avg}\)

\(L_{ent}\)

\(\frac{LAM}{DET}\)

Avg Activity

IS

IV

RA

\(L_{avg}\)

1

0.999*

− 0.609*

0.091

0.073

0.031

0.201

\(L_{ent}\)

 

1

− 0.607*

0.107

0.073

0.035

0.206

\(\frac{LAM}{DET}\)

  

1

0.286

− 0.314*

− 0.098

0.013

Avg Activity

   

1

− 0.162

− 0.132

0.157

IS

    

1

0.355*

− 0.140

IV

     

1

−  0.185

RA

      

1

  1. Only the recurrence plot measures that showed significant differences between the two groups are listed.
  2. The table lists the Spearman correlation coefficient. Significant correlations(p < 0.05) are marked with an *.
  3. IS: Interdaily stability; IV: Intradaily variability; RA: Relative Amplitude; \(L_{avg}\): Average diagonal line length; \(L_{ent}\): Diagonal line entropy; \(\frac{LAM}{DET}\): Laminarity to determinism ratio.
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