Evaluation of a multi-component early warning system for pastoralist populations in Doolo zone, Ethiopia: mixed-methods study

Table 2 Indicators per surveillance system attribute

Attribute	Indicator
Usefulness	Number of alerts that resulted in public health action
	Type of response resulting from alerts
	Proportion of alerts reported through each source
Completeness and consistency of reporting	Completeness of information in the EWAR cascade
Positive predictive value	Proportion of events, alerts, and responses identified out of the total number of signals received
Timeliness of signals, assessment, and response	Proportion of signals verified within 24 and events assessed within 48 h after reporting
Timeliness of signals, assessment, and response	Median time to assessment and response after reporting

ISSN: 1752-1505