Table 7.
OPLS of PPT over trapezius in FM. Regressors used data from microdialysis of this muscle (except pain variables from microdialysis) (cf. Table 3). Only significant variables are shown (i.e., the variables with VIP > 1.0 and absolute p(corr) ≥ 0.50).
| Variables | VIP | p(corr) |
|---|---|---|
| Difference Glutamate Trapezius 160 min–140 min | 1.84 | 0.78 |
| Difference Lactate Trapezius 160 min–140 min | 1.71 | 0.72 |
| Glutamate Trapezius 160 min | 1.51 | 0.64 |
| Blood flow Trapezius 140 min | 1.41 | 0.60 |
| Difference Glycerol Trapezius 160 min–140 min | 1.39 | 0.59 |
| Mean Blood flow Trapezius 140–220 min | 1.36 | 0.57 |
| Difference Pyruvate Trapezius 160 min–140 min | 1.20 | 0.51 |
| R2 | 0.32 | |
| Q2 | 0.19 | |
| CV-ANOVA P-value | 0.050 | |
| n | 30 |
VIP and p(corr) are reported for each regressor (i.e., the loading of each variable scaled as a correlation coefficient and therefore standardizing the range from −1 to + 1). The sign of p(corr) indicates the direction of the correlation with the dependent variable (+ = positive correlation; − = negative correlation). Hence, a positive p(corr) for a certain variable indicates a positive correlation with PPT over trapezius in FM in the multivariate context. The four bottom rows report R2, Q2, P-value of the CV-ANOVA, and number of subjects included in the regression (n) from the OPLS regression (see Statistics for details).