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Table 3 The Spearman’s (rho) correlations between QST pain outcomes and sleep measures (n = 48)

From: Characterization of sleep disturbance in established rheumatoid arthritis patients: exploring the relationship with central nervous system pain regulation

 

QST

PPTt

PPTw

TSt

CPM

Actigraphy

 

Sleep fragmentation Index

− 0.03

− 0.12

0.34*

− 0.11

Sleep efficiency

0.03

0.04

− 0.32*

0.00

WASO

− 0.05

− 0.07

0.36*

− 0.14

Sleep duration

− 0.05

− 0.05

− 0.02

− 0.02

Sleep onset latency

− 0.15

− 0.05

0.12

0.15

Number of awakenings

− 0.11

− 0.19

0.26

− 0.10

Sleep Diary

    

Sleep efficiency

0.13

0.13

0.01

− 0.15

WASO

0.04

0.02

− 0.11

0.29*

Sleep duration

0.00

0.00

0.10

− 0.06

Sleep onset latency

− 0.20

− 0.22

− 0.04

0.05

Number of awakenings

− 0.16

− 0.18

0.15

0.02

  1. Note Spearman’s correlation coefficients. *p < .05
  2. Abbreviations QST, quantitative sensory testing. PPT, pressure pain threshold (t = trapezius, w = wrist). TS, temporal summation (t = trapezius). CPM, conditioned pain modulation. WASO, wake after sleep onset