Psoriatic arthritis: exploring the occurrence of sleep disturbances, fatigue, and depression and their correlates.

The Pearson correlation coefficient between the dependent variables was all highly significant ( p < 0.001) and was between sleep disturbances and fatigue 0.632, between fatigue and anxiety/depression 0.449, and between sleep disturbances and anxiety/depression 0.308.

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For BMI in our PsA patients, we found in univariate but not in the adjusted analysis a significant association between increased BMI and sleep disturbances, and a borderline significant association between BMI and fatigue.

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