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Table 3 Measurement of performance of local radiographers in echocardiography-based screening (“negative” refers to a normal screening evaluation; “positive” refers to a screening evaluation that is abnormal)

From: Prevalence of rheumatic heart disease in Zambian school children

Number of screening tests Local radiographers Quality assurance specialist
450 Negative Negative
12 Negative Positive
8 Positive Positive
8 Positive Negative