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Does Depression Influence Symptom Severity in Irritable Bowel Syndrome? Case Study of a Patient With Irritable Bowel Syndrome and Bipolar Disorder

From the Department of Experimental Psychology (C.C., M.M.), University of Oxford; Department of Psychology (D.J.), St. Andrews University; and University Department of Psychiatry (G.M.G.), Warneford Hospital, Oxford.

View larger version (33K): [in a new window]   Fig. 1. Time plot to show daily mood ratings, daily IBS ratings, and prescribed psychotropic drugs across the study period.

View larger version (18K): [in a new window]   Fig. 2. Autocorrelation of daily mood ratings with 200 day maximum lag.

View larger version (17K): [in a new window]   Fig. 3. Autocorrelation of daily IBS ratings with 200 day maximum lag.

View larger version (13K): [in a new window]   Fig. 4. Cross-correlation between pre-whitened mood ratings and pre-whitened IBS symptom severity ratings with maximum lag of 15 days.