Prediction of Delayed Colonic Transit Using Bristol Stool Form and Stool Frequency in Eastern Constipated Patients: A
Veeravich Jaruvongvanich1,2, Tanisa Patcharatrakul2,3, Sutep Gonlachanvit3
1Department of Internal Medicine, University of Hawaii, Honolulu, HI, USA.
Background/Aims:
The correlation between the Bristol stool form scale (BSFS) and colonic transit time (CTT) has been reported in Western populations. Our study aims to study the relationship between BSFS, stool frequency, and CTT in Eastern patients with chronic constipation.
Methods:
A total of 144 chronic functional constipation patients underwent colonic transit study by using radio-opaque markers, anorectal manometry, and balloon expulsion test. Stool diary including stool forms and frequency was recorded. Delayed CTT was defined as the retention of more than 20.0% of radio-opaque markers in the colon on day 5.
Results:
Twenty-five patients (17.4%) had delayed colonic transit. Mean 5-day BSFS (OR, 0.51; 95% CI, 0.34-0.79; P = 0.021) and stool frequency (OR, 0.60; 95% CI, 0.44-0.83; P = 0.002) were independently associated with delayed CTT by logistic regression analysis. Mean 5-day BSFS (area under the curve [AUC], 0.73; 95% CI, 0.62-0.84; P < 0.001) and stool frequency (AUC, 0.75; 95% CI, 0.63-0.87; P < 0.001) fairly predicted delayed CTT. The optimal mean 5-day BSFS of ≤ 3 provided 68.0% sensitivity, 69.7% specificity, and 69.4% accuracy, and the optimal stool frequency ≤ 2 bowel movements in 5 days provided 64.0% sensitivity, 83.1% specificity, and 84.0% accuracy for predicting delayed CTT.
Conclusions:
Both stool form and frequency were significantly associated with delayed CTT. Stool frequency ≤ 2 and BSFS 1-3 rather than BSFS 1-2 that was used in the Westerners could be used as surrogate for delayed CTT in Eastern patients with constipation.
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