Fig. 2

Incremental cost-effectiveness ratios (ICERs) expressed as additional cost per MET-hour gained (US$). The applied benchmark for cost-effectiveness of (S0.50 to 1.00 per MET-hour gained) is represented by the grey shaded area. Outcomes at or below threshold are deemed cost-effective at that willingness to pay. Closed circles indicate moderate level of certainty. Uncertainty intervals for ICERs are not displayed as most studies did not report it