## 3 Results
### Mediation Analysis  
Four regression analyses were performed with model 6 of PROCESS (Figure 1). In the first one, utilizing general fatigue (M1--the influence of the fear of movement in general fatigue) as the outcome variable, a significant effect was found with a coefficient of 0.122 and a \(p\)-value of 0.005. In the second regression model, with the FIQR function as mediator 2 (M2--the influence of fear of movement and general fatigue for explaining the effect on FIQR function), a significant effect was found in both variables with a coefficient of 0.221 and a \(p\)-value of 0.005 for the fear of movement, and a coefficient of 0.443 and a \(p\)-value of 0.008 for general fatigue The third regression analysis which took self-efficacy for physical function as the outcome variable (estimating its effect through general fatigue, the FIQR function, and the direct effect of fear of movement) obtained a significant influence of the FIQR function (with a coefficient of \(-0.176\) and a \(p\)-value \(<0.001\)) and the fear of movement (with a coefficient of \(-0.073\) and a \(p\)-value of 0.018) in self-efficacy for physical function. On the other hand, the effect of general fatigue was not significant (with a coefficient of 0.040 and a \(p\)-value of 0.529). The last regression analysis which included the total effect model of the fear of movement on self-efficacy for physical function had a coefficient of \(-0.116\) and a \(p\)-value of 0.0003.  
As for the indirect effects of the mediation analysis, significant mediations were obtained in the relation between the fear of movement, the FIQR function, and self-efficacy for physical function (effect of \(-0.039\), SE of 0.014, and a 95% interval coefficient from \(-0.066\) to \(-0.011\)), and between the fear of movement, general fatigue, the FIQR function, and self-efficacy for physical function (effect of \(-0.009\), SE of 0.006 and a 95% interval coefficient from \(-0.023\) to \(-0.0003\)). Significant observations were not observed in the relationship among the fear of movement, general fatigue, and self-efficacy for physical function (effect of 0.005, SE of 0.008, and a 95% interval coefficient from \(-0.011\) to 0.021).  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & **Fear of Movement** & **General Fatigue** & **Physical Fatigue** & **Mental Fatigue** & **Activity Reduction** & **Motivation Reduction** \\ \hline FIQ overall impact & 0.309 ** & 0.202 * & 0.216 * & 0.119 & 0.432 ** & 0.222 * \\ FIQ symptoms & 0.346 ** & 0.262 ** & 0.192 * & 0.255 ** & 0.330 ** & 0.296 ** \\ FIQ function & 0.385 ** & 0.268 ** & 0.226 * & 0.265 ** & 0.340 ** & 0.272 ** \\ FIQR total & 0.388 ** & 0.276 ** & 0.239 ** & 0.257 ** & 0.400 ** & 0.314 ** \\ CSE & \(-0.259\) ** & \(-0.178\) & \(-0.265\) ** & \(-0.186\) * & \(-0.385\) ** & \(-0.368\) ** \\ FSE & \(-0.311\) ** & \(-0.221\) * & \(-0.324\) ** & \(-0.014\) & \(-0.411\) ** & \(-0.170\) \\ PSE & \(-0.289\) ** & \(-0.305\) ** & \(-0.289\) ** & \(-0.289\) ** & \(-0.434\) ** & 0.285 ** \\ Fear of movement & - & 0.277 ** & 0.251 ** & 0.211 ** & 0.224 ** & 0.242 ** \\ \hline \hline \end{tabular}
\end{table}
Table 4: Correlations among the fear of movement, fatigue dimensions, fibromyalgia impact, and self-efficacy.