Two relatively new blood tests may help diagnose irritable bowel syndrome. One test is for irritable bowel syndrome with diarrhea , and the other is for irritable bowel syndrome with both diarrhea and constipation (irritable bowel syndrome mixed IBS-M). Neither test is able to diagnose irritable bowel syndrome with constipation (IBS-C).
case study-a detailed analysis of a person or group from a social or psychological or medical point of view. analysis-an investigation of the component parts of a whole and their relations in making up the whole.
1 Cohort study or Panel study: a particular form of longitudinal study where a group of patients is closely monitored over a span of time.  Ecological study: an observational study in which at least one variable is measured at the group level.