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. 2022 Jan 21;23:75. doi: 10.1186/s12891-022-05009-1

Table 4.

Partial correlations between the heart rate variability parameters and pain duration independent of age and sex

df r p
At rest Heart rate 16 −0.743 < 0.001
n = 20 SDNN 16 0.423 0.080
Low frequency power 16 0.434 0.072
High frequency power 16 0.517 0.028
Under Stimulation Heart rate 18 −0.383 0.096
n = 22 SDNN 18 0.313 0.179
Low frequency power 18 0.368 0.111
High frequency power 18 0.219 0.353

SDNN: Standard deviation of R-wave to R-wave interval; Significant results (p < 0.00625) are printed in bold