CRP and diverticulitis: These symptoms are non-specific, and the clinical diagnosis of diverticulitis has a sensitivity of only 45%–72% (15, , , , –20); however, the diagnostic accuracy of acute diverticulitis may be increased to 86% with a combination of direct left-sided tenderness, absence of vomiting, and a C-reactive protein (CRP) > 50 mg/L (21,22).