Table 1.

Four decision parameters affecting early endoscopy

Cause of complication	Probability of complication	Cost of complication
Endoscopy	pendosc	Complendosc
Bleeding	pbleed	Complbleed
Decision criterion	$\frac{P_{\mathrm{endosc}}}{P_{\mathrm{bleeed}}}$	<	$\frac{{\mathrm{Compl}}_{\mathrm{bleed}}}{{\mathrm{Compl}}_{\mathrm{endosc}}}$