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Table 4 Pearson correlation coefficient for the relationship between the outcome measures

From: Effect of manual therapy with exercise in patients with chronic cervical radiculopathy: a randomized clinical trial

Outcomes r2 P value
NPRS vs.
 NDI 0.82 < 0.000
 CROM—extension −0.02 0.918
 CROM—lateral flexion (affected) −0.05 0.817
 CROM—rotation (affected) −0.32 0.100
 PPT—cervical spine −0.33 0.086
 PPT—affected dermatome −0.03 0.906
 HPT—cervical spine 0.04 0.833
 HPT—affected dermatome −0.17 0.475
 CPT—cervical spine 0.11 0.587
 CPT—affected dermatome 0.10 0.683
NDI vs.
 CROM—extension −0.2 0.304
 CROM—lateral flexion (affected) −0.19 0.339
 CROM—rotation (affected) −0.26 0.18
 PPT—cervical spine −0.16 0.426
 PPT—affected dermatome 0.16 0.538
 HPT—cervical spine 0.07 0.727
 HPT—affected dermatome −0.22 0.362
 CPT—cervical spine −0.03 0.875
 CPT—affected dermatome 0.22 0.37
  1. Abbreviations: NPRS Numeric pain rating scale, NDI Neck disability index, CROM Cervical range of motion, PPT Pressure pain threshold, HPT Heat pain threshold, CPT Cold pain threshold