Table 4

Sensitivity and positive predictive value

A6 system	Determined by verbal autopsy		Total
A6 system	Injury	No injury	Total
Injury	(TP) 550	(FP) 72	622
No injury	(FN) 179	(TN) 4492	4671
Total	729	4564	5293

Sensitivity: (550×100)/(550+179)=75.4%.
Specificity: (4492×100)/(4492+72)=98.4%.
Positive predictive value: (550×100)/(550+72)=88.4%.
Negative predictive value: (4492×100)/(4492+179)=96.2%.
FN: false negative; FP: false positive; TN: true negative; TP: true positive.