Diagnostic study of choice for<unk>  is ROME III criteria. Rome III criteria includes symptom onset for more than 6 months and two or more number of specific symptoms. Specific symptoms of<unk>  include straining, hard stool, sensation of incomplete evacuation, sensation of obstruction, necessity of manual maneuvers, less than 3 bowel movements per week, lack of loose stool, and lack of irritable bowel syndrome (IBS).
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