Embedded Files
70 in GSI and PST and T-score = 63 in PSDI). Since a patient can be identifi ed as a “clinical case” when the score exceeds the cutoff point (90th percentile) on the GSI, 76.2% of the participants were “clinical case”. Considering the standardized norms of psychiatric patients (women, n = 136) in the SCL-90-R (González de Rivera et al., 2002), the FM group obtained between T-score = 49 in depression and paranoid ideation and T-score = 55 in somatization, and similar levels in the general indexes (T-score = 51 in GSI and PST and T-score = 49 in PSDI). Relationship between Psychopathology, Physical Symptoms and Impairment Pain intensity was signifi cantly correlated with somatization, obsessive-compulsive, depression, anxiety, additional scale, and GSI (between r = .24, p < .0013 and r = .31, p < .0013) (see Table 1). Poor sleep quality and impairment were signifi cantly correlated with all psychopathological dimensions, additional scale, and general indexes (between r = .24, p < .0013 and r = .54, p < .0013, and between r = .28, p < .0013 and r = .50, p < .0013, respectively). In the following analyses, only the psychopathological dimensions signifi cantly correlated with the DVs (pain intensity, poor sleep quality and impairment) were included as predictors. Psychopathology as a Predictor of Physical Symptoms and Impairment When pain intensity was the DV, the model including somatization, obsessive-compulsive, depression, and anxiety as independent variables (IVs) was signifi cant, F(4,171) = 5.70, p < .01, but only somatization was a signifi cant predictor (see Table 2). When poor sleep quality was the DV, the model composed of all psychopathological scales as IVs was signifi cant, F(9,170) = 9.60, p < .01, and somatization and obsessive-compulsive were Psychopathology as a Moderator of the Relationship Between Physical Symptoms and Impairment in Fibromyalgia Patients 217 signifi cant predictors. Finally, when impairment was the DV, the model including all psychopathological scales as IVs was signifi cant, F(9,171) = 9.24, p < .01, and somatization, depression and anxiety were signifi cant predictors. Psychopathology as a Moderator between Physical Symptoms and Impairment Based on the cutoff point ≥ 59 (severe impact) in the FIQ (Bennett et al., 2009), 115 women with severe FM were identifi ed. Compared to the 66 patients with moderate-mild FM (< 59), the patients with severe FM showed a signifi cantly higher level of pain intensity, poor sleep quality and psychopathology (PSDI) (between t(98.834) = 7.60, p < .001, 95% CI [2.19-1.28], d = 1.25 in pain intensity, and t(157.664) = 3.03, p < .001, 95% CI [0.62-0.13], d = 0.44 in paranoid ideation). In the severe FM group two moderation analyses tested whether the pain intensity × psychopathology interaction and the poor sleep quality × psychopathology interaction were signifi cant predictors of impairment (see Table 3). In Model 1, pain intensity and poor sleep quality were identifi ed as signifi cant predictors. In Model 2, the effect of poor sleep quality disappeared when psychopathology was included, and pain intensity and psychopathology were signifi cant predictors. In Model 3a, the contribution of pain intensity remained signifi cant but that of psychopathology disappeared, and the effect of pain intensity × psychopathology interaction was not signifi cant. In Model 3b, pain intensity remained a signifi cant predictor, the contribution of psychopathology was close to signifi cance, and a signifi cant effect of poor sleep quality × psychopathology interaction was observed. This fi nding revealed that the relationship between poor sleep quality and impairment was moderated by psychopathology. Figure 1 shows the poor sleep quality × psychopathology interaction. Simple slope in the line showing high psychopathology, t(112)= 3.09, p < .01, was signifi cant. Patients with different levels of psychopathology did not differ in impairment under conditions Table 2 Models Predicting Pain Intensity, Poor Sleep Quality and Impairment in Women with Fibromyalgia ote: The Bonferroni correction was applied. * p < .0013 M. Pilar Martínez, Ana I. Sánchez, Rafael Cáliz, and Elena Miró 218 of “low-medium” poor sleep quality. However, under conditions of
Google Sites
Report abuse