Cotter et al reported the Microscopic Colitis Disease Activity Index (MCDAI). The authors are from the Mayo Clinic and the University of California at San Diego.
Patient selection: microscopic colitis
Parameters:
(1) average number of unformed stools per day over the past week
(2) nocturnal stools over the past week
(3) abdominal pain over the past week as a VAS score from 1 to 10
(4) average weight loss over the past month in pounds
(5) fecal urgency over the past week
(6) number of episodes of fecal incontinence over the past month
Parameters
Finding
Points
number of unformed stools per day
0.31 *
nocturnal stools
no
0
yes
0.78
abdominal pain
0.22 *
average weight loss
0.11
fecal urgency
no
0
yes
0.93
number of episodes of fecal incontinence
0.01 *
total score =
= SUM(points for all 6 parameters) + 1.1
Interpretation:
• minimum score: 1.32
• maximum score: around 10
• A 1 unit decrease in disease activity is associated with a 9 point improvement in the quality of life on the IBD questionnaire.
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