Table 1. CT severity scores based on CT findings.

Scores	Appendiceal diameter	Appendiceal wall changes	Caecal changes	Periappendiceal inflammatory stranding	Phlegmon or abscess formation
0	<6 mm	Absent	Absent	Absent	None
1	6–10 mm	Enhancing wall thickening	Wall thickening	Milda	Phlegmon
2	>10 mm	Defect in enhancing wall thickening	Wall thickening with surrounding fluid	Moderate to severeb	Abscess

^aPerceptible haziness or increased attenuation in the mesoappendix or retroperitoneal fat.

^bMore severe change than score 1.