In the absence of aetiology-based tools for diagnosing pneumonia, it is essential that community health workers (CHWs) correctly ascertain a child’s RR and classify fast breathing according to WHO guidelines. Different tools for counting RR have recently been developed. One important step toward introduction of new RR counting devices is to understand their accuracy. In the absence of gold standard technology for counting RR, it has been proposed that the agreement between
the test device and a reference standard be evaluated. However, little data currently exist to guide selecting the most appropriate reference standard and measures of agreement.
The Pneumonia Diagnostics Project (PDP) tested four manual RR counters with CHWs across four countries in sub-Saharan Africa and Southeast Asia from February-June 2015. Reference standard was a continuous respiratory patient monitor with Phasein ISA CO2 capnography counting RR.
Another project, the Acute Respiratory Infection Diagnostic Aid (ARIDA) project, tested ChARM, an automated RR counter against a reference standard of two to four pediatricians (video expert panel) who counted the child’s breaths in 60 seconds from a video recording.
This presentation, delivered at the 67th annual meeting of the American Society of Tropical Medicine and Hygiene, presents findings from these evaluations.
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