Table 3.

Decision rules for relative cost-effectiveness.

Decision Rule	Formula
Incremental net monetary benefit	$\lambda \left(Q_1-Q_0\right)-\left(C_1-C_0\right)>0$
Incremental net health benefit	$\left(Q_1-Q_0\right)-\frac{\left(C_1-C_0\right)}{\lambda }>0$

λ: cost-effectiveness threshold; Q₁: expected consequences derived from new technology, Q₀: expected consequences derived from comparator technology; C₁: expected cost derived from new technology; C₀: expected cost derived from comparator technology. Equivalent decision rules can be expressed as incremental net monetary or health benefits [34,35].