Table 5.

Incremental Cost-Effective Ratio (ICER) per Quality-adjust Life Year (QALY) Gain Calculation

	Non-ultrasound surveillance	Ultrasound surveillance
Costs	136.3 USD*, 5,046 THB	633.9 USD*, 22,965 THB
Life-years (LY)	0.8728	0.9934
Quality-adjusted life year (QALY)	0.8722	0.9894
Incremental costs	494.6 USD*, 17,919 THB
Incremental LY	0.1206
Incremental QALY	0.1172
ICER per QALY gained	4,222.6 USD*, 152,985 THB

THB, Thai baht; USD, United States dollar; *Conversion rate of THB to USD at 36.23 THB to 1 USD, according to Bank of Thailand official exchange rate on 27 October 2023