Background:Fatigue is a well-recognized symptom in patients with inflammatory bowel
disease and irritable bowel syndrome (IBS), and has been associated with
psychological comorbidity and impaired quality of life in both. However,
features associated with fatigue in patients with microscopic colitis (MC)
are less clear.Materials and methods:We conducted a cross-sectional survey of patients with a new diagnosis of MC
including levels of anxiety, depression, somatization, quality of life, and
IBS-type symptoms. Levels and impact of fatigue were assessed using the
Inflammatory Bowel Disease Fatigue self-assessment scale. Mean scores were
compared against various patient characteristics, and were also correlated
with anxiety, depression, somatization, and quality-of-life scores.Results:In total, 129 patients with MC diagnosed between 2010 and 2015 returned
completed postal questionnaires. Common histological subtypes were
collagenous colitis (53.5%, n = 69) and lymphocytic colitis
(38.8%, n = 50). Higher mean fatigue severity and impact
scores were associated with the presence of irritable-bowel-syndrome-type
symptoms, abnormal levels of anxiety and depression, and high levels of
somatization (p < 0.0001 for all), but those reporting
ongoing symptoms attributable to MC did not report significantly higher
scores. There were significant positive correlations between total anxiety,
depression, or somatization scores and fatigue severity and impact scores,
and significant negative correlations with quality-of-life measures
(p < 0.001 for all).Conclusions:Fatigue in MC appears to be associated with reporting IBS-type symptoms,
psychological comorbidity and impaired quality of life. It may therefore
represent an important target for treatment.