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Table 4 Regression of pressure pain threshold of trapezius in TM using the intramuscular variables (R 2 = 0.39)

From: Algogenic substances and metabolic status in work-related Trapezius Myalgia: a multivariate explorative study

Variable

Time point

VIP

Sign of coeff

Blood flow

150 min

1.14

-

 

170 min

1.07

-

 

190 min

1.05

-

 

210 min

1.40

-

 

335 min

1.18

-

 

345 min

1.56

-

HHB

21-40 min

1.09

-

 

recov1

1.47

-

 

recov2

1.36

-

 

STR

1.03

+

OHB

recov1

1.27

-

 

recov2

1.35

-

THB

21-40 min

1.01

-

 

PEG-0-20 min

1.17

-

 

recov1

1.55

-

 

recov2

1.63

-

[Lactate]

170 min

1.27

-

 

210 min

1.06

-

 

335 min

1.11

-

[Pyruvate]

170 min

2.13

-

 

190 min

1.07

-

 

210 min

1.14

-

[Glucose]

170 min

1.67

-

 

335 min

1.49

-

 

345 min

1.29

-

[Glutamate]

345 min

1.09

-

[BKN]

150 min

2.52

-

 

170 min

1.13

-

 

310 min

1.42

+

 

325 min

1.53

+

 

335 min

1.73

+

 

355 min

1.22

+

[IL-6]

150 min

2.57

-

 

170 min

1.50

-

 

190 min

1.55

-

 

210 min

1.66

-

 

345 min

1.10

-

 

355 min

1.22

-

[K + ]

170 min

1.77

+

 

190 min

1.19

+

 

210 min

1.00

+

 

335 min

1.04

+

  1. [substance] denotes concentration of the substance. HHB = deoxy-haemoglobin, OHB = oxyhaemoglobin, THb = total haemoglobin, BKN = Bradykinin, IL-6 = interleukin 6, K+ = potassium, PEG = repetitive low-force exercise performed unilaterally on a pegboard, STR = STROOP test.
  2. VIP values and sign of coefficient (coeff) are given. Note that the variables are grouped and sorted within each variable with respect to time point. A positive coefficient indicates that this variable will be associated with high PPT values and vice versa. Note the inverse construction of blood flow variables.
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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