Table 1.

Definitions Used in This Paper

Activity/Hypothesis	Label	Description
Screening strategy	Echo A	Screen all indigenous children aged 8 and 12 years living in 80 rural/remote communities of the NT annually
	Echo B	Screen all indigenous children aged 5–12 years in approximately half (40) of the rural/remote NT communities in alternate years
Screening effectiveness hypothesis	Scenario 1	Assumes that screening diagnoses RHD 1 year earlier than current practice
	Scenario 2	Assumes that screening diagnoses RHD 2 years earlier than current practice
	Scenario 3	Assumes that screening diagnoses RHD 3 years earlier than current practice

NT indicates Northern Territory; RHD, rheumatic heart disease.