Asociación entre la intensidad de dolor y las variables psicológicas en pacientes con síndrome de dolor regional complejo. Un estudio transversal correlacional.

Introduction: the main objective of this study was to describe the presence of psychological factors and quantify the relationship between them and the intensity of pain perceived by patients with Complex Regional Pain Syndrome (CRPS). Material and method: a cross-sectional observational study with consecutive non-probabilistic sampling was carried out from January 25, 2022, to April 12, 2022 at Universidad Europea de Canarias (Spain) of adults aged between 18 and 65 years with a medical diagnosis of CRPS who did not receive pharmacological and non-pharmacological therapy to control symptoms. Pain intensity was measured as a primary variable and kinesiophobia (TSK-11), perceived stress (PSS), catastrophism (PCS), anxiety (STAI), depression (BDI), hypervigilance (PAVQ) and quality of life as secondary variables (SF-36). The statistical analysis was performed with the SPSS Statistic 28 (IBM®) program, performing the descriptive analysis, the normality tests, and the calculation of the Pearson's r correlation coefficient. Results:19 participants were selected (M = 9, 47.3 %; H = 10, 52.6 %) whose pain intensity was moderate (5.65 ± 2.92). There was a moderate and positive linear correlation between pain intensity and kinesiophobia (Pearson's r = 0.479, r² = 0.230, 1-r² = 0.770) as well as pain intensity and depression (Pearson's r = 0.407, r² = 0.166, 1-r² = 0.834). In addition, the main variable is strongly correlated with the SF36-DC (Pearson's r = 0.663, r² = 0.440, 1- r² = 0.560), SF36-SG (Pearson's r = 0.567, r² = 0.321, 1- r² = 0.679) and SF36-V (Pearson's r = 0.629, r² = 0.396, 1- r² = 0.604). Conclusions: Pain intensity is moderately associated with kinesiophobia and depression in CRPS patients. Also, pain intensity correlates strongly with functionality associated with bodily pain, vitality, and perceived global health. [ABSTRACT FROM AUTHOR]