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Structural equation model of insomnia severity and sleep quality. IU = Intolerance of Uncertainty; AS = Anxiety Sensitivity; DEP = Depression; ANX = Anxiety; IS = Insomnia Severity; SQ = Sleep Quality. The solid lines represent statistically significant paths (p < 0.05). The dashed lines represent not significant paths. The thickness of the lines representing structural relationships is proportional to the effect size of the path coefficient.
