Clinical features

Ask about any fever ^c

Why?

A fever early in the illness makes inflammatory bowel disease much less likely

Patient	Target Disorder and Reference Standard	Diagnostic Test	LR+ (95% CI)	Post-test Probability
colitis undergoing sigmoidoscopy c (pre-test probability: 50%)	inflammatory bowel disease (stool culture, histology, follow-up)	no fever	4.2 (1.6 to 11)	80%
		late fever > 38 C	3.3 (1.0 to 10)	76%
		early fever, previous slight symptoms	3.7 (0.47 to 29)	78%
		early fever	0.077 (0.025 to 0.24)	7%