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About 70–80% of patients with anxiety syndromes suffer from depression. Mood variability including hypomania, cyclothymia and hyperthymia have been described in 40–50% of patients with depression. There is an emerging literature that such variability could also characterize anxiety disorders. The aim of this study was to visually document and quantify mood variability in patients with anxiety disorders.

Twenty patients with anxiety disorders and 22 normal control subjects completed two visual analogue scales (VAS) on depressed mood and high mood, twice per day for 14 days. The Beck Depression Inventory and the Altman Self-Rating Mood Scale were used for concurrent validity.

On the VAS, patients showed higher levels of depressed and high moods, and greater mood variability than the controls. Variability of depressed and high moods was highly correlated.

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