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Table 5 Significant correlations with r absolute value ≥ 0.05 between symptom scales and HRV parameters evaluated during sleeping hours (0000 to 0600 hours).

From: Nocturnal heart rate variability parameters as potential fibromyalgia biomarker: correlation with symptoms severity

 

Fibromyalgia

(n = 22)

Control

(n = 22)

  

r

P value

 

r

sP value

FIQ total score

   

SDNN

0.69

< 0.001

    

SDANN

0.60

0.003

FIQ VAS pain

SDSD

-0.65

0.001

   
 

RMSSD

-0.65

0.001

   
 

pNN50

-0.62

0.002

   

FIQ VAS fatigue

   

SDNN

0.65

0.001

    

SDANN

0.57

0.005

FIQ VAS anxiety

   

SDNN

0.62

0.002

    

SDANN

0.53

0.011

FIQ VAS depression

   

SDNN

0.52

0.012

    

SDANN

0.51

0.015

COMPASS constipation

SDNN

-0.53

0.010

   

HADS depression

Mean NN

-0.53

0.010

   

SF-36 mental component

SDSD

0.64

0.001

   
 

RMSSD

pNN50

0.64

0.64

0.001

0.001

   
  1. COMPASS, composite autonomic symptom scale; HADS, hospital anxiety and depression scale; FIQ, fibromyalgia impact questionnaire; Mean NN, mean NN interval; pNN50, percentage of adjacent pairs of R-R intervals that differ by more than 50 ms from each other in a given time period; RMSSD, square root of the mean of the squares of differences between adjacent NN intervals; SDANN, mean standard deviation of the average NN intervals calculated over 5 minutes; SDNN, standard deviation of the NN intervals; SDSD, standard deviation of the successive NN differences; SF-36, health survey short format 36 items; VAS, visual analogue scale.
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Arthritis Research & Therapy

ISSN: 1478-6362

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