The sensitivity associated with any small bowel disease was 70%.
The pretest probability of IBS (prevalence) was 5%.
The sensitivity and specificity of office consultation was 67% and 70%, respectively.
The sensitivity and specificity of SBFT was 70% and 92%, respectively.
The sensitivity and specificity of HBT was 58% and 87%, respectively.
The sensitivity and specificity of FS was 60% and 70%, respectively.
The sensitivity and specificity of total laboratory tests was 85% and 95%, respectively.
The sensitivity and specificity of total colonoscopy was 70% and 80%, respectively.
These data formed the principal effectiveness parameters used in the decision tree.