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Table 3 QST measurements between patients with and without PAP

From: Preoperative dynamic quantitative sensory testing in remote pain-free areas is associated with axial pain after posterior cervical spinal surgeries

 

Patient without PAP

Patients with PAP

Patients with CPAP^

Number of subjects

101

21

8

PPT in neck (Kg/cm2)

4.5 ± 2.1

3.5 ± 1.7*

3.1 ± 1.4#

PPT in TA (Kg/cm2)

3.7 ± 1.4

3.4 ± 1.4

3.1 ± 1.2

CPM (Kg/cm2)

0.8 ± 0.6

0.5 ± 0.6*

0.2 ± 0.6#

TS

1.6 ± 1.0

2.4 ± 1.1*

2.8 ± 1.0#

  1. Measurements are expressed as the mean ± SD
  2. QST Quantitative sensory testing, PAP Postoperative axial pain, CPAP Chronic postoperative axial pain, PPT Pressure pain threshold, CPM Conditioned pain modulation, TS Temporal summation
  3. *Statistically significant differences between patients with and without PAP
  4. #Statistically significant differences between patients without PAP and patients with CPAP
  5. ^Eight of 21 patients with PAP developed CPAP; thus, all measurements of patients with CPAP were included in the measurements of those with PAP