Which statement best describes the diagnostic criteria for irritable bowel syndrome (IBS)?

Which statement best describes the diagnostic criteria for irritable bowel syndrome (IBS)?

• A. Recurrent abdominal pain or discomfort at least 3 days per month for 3 months, with improvement after bowel movement and changes in stool frequency or form
• B. Persistent abdominal pain with fever and weight loss
• C. Pain that occurs only at night with no bowel changes
• D. Abdominal pain daily for 6 months with progressive weight loss

Answer: (A)

IBS is diagnosed based on symptom patterns that describe a functional, nonstructural GI disorder. The essential idea is recurrent abdominal pain that is closely linked to bowel habits and lasts long enough to indicate a chronic pattern, rather than an acute illness. The statement matches this by describing pain that occurs on at least a regular basis (3 days per month) for several months and, importantly, that the pain improves after a bowel movement and is accompanied by changes in stool frequency or stool form. This combination—pain related to defecation and associated changes in stool—fits the typical IBS presentation and is the hallmark used in established criteria. Choices that mention fever with weight loss, pain that happens only at night with no bowel changes, or daily pain with progressive weight loss point toward organic diseases or inflammatory processes rather than a functional syndrome like IBS, so they are less consistent with how IBS tends to present.

IBS is diagnosed based on symptom patterns that describe a functional, nonstructural GI disorder. The essential idea is recurrent abdominal pain that is closely linked to bowel habits and lasts long enough to indicate a chronic pattern, rather than an acute illness. The statement matches this by describing pain that occurs on at least a regular basis (3 days per month) for several months and, importantly, that the pain improves after a bowel movement and is accompanied by changes in stool frequency or stool form. This combination—pain related to defecation and associated changes in stool—fits the typical IBS presentation and is the hallmark used in established criteria.

Choices that mention fever with weight loss, pain that happens only at night with no bowel changes, or daily pain with progressive weight loss point toward organic diseases or inflammatory processes rather than a functional syndrome like IBS, so they are less consistent with how IBS tends to present.