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

Table 5 Regression of pressure pain threshold of trapezius in CON using the intramuscular variables (R ² = 0.39)

*Variable*	*Timepoint*	*VIP*	*Sign of coeff*
Blood flow	150 min	1.73	+
	170 min	1.90	+
	190 min	1.94	+
	210 min	2.40	+
	310 min	1.45	+
	325 min	1.62	+
	335 min	1.59	+
	345 min	1.95	+
	355 min	1.16	+
OHB	21-40 min	1.28	-
	PEG-0-20 min	1.67	-
	recov1	1.20	+
THB	PEG-0-20 min	1.38	-
	21-40 min	1.12	+
	recov1	1.29	+
[Lactate]	190 min	1.17	+
	210 min	1.37	+
[Glucose]	310 min	1.43	+
	345 min	1.04	+
[Glutamate]	170 min	1.54	+
[BKN]	170 min	1.12	+
[IL-6]	210 min	1.50	+
	310 min	1.42	+
	325 min	1.06	+
	355 min	1.17	+
[K ⁺ ]	150 min	1.73	+
	210 min	1.71	+
	325 min	2.21	+
	335 min	1.35	+
	345 min	1.52	+
	355 min	1.57	+
[5-HT]		1.45	-
[PINP]		1.39	-

[substance] denotes concentration of the substance. OHB = oxyhaemoglobin, THb = total haemoglobin, BKN = Bradykinin, IL-6 = interleukin 6, K⁺ = potassium, 5-HT = serotonin, PINP = N-terminal propeptide of procollagen type I, PEG = repetitive low-force exercise performed unilaterally on a pegboard.
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.

ISSN: 1471-2474