Field evaluation of COVID-19 rapid antigen test: Are rapid antigen tests less reliable among the elderly?

Figure 1 Weekly number of symptomatic patients tested by rapid antigen-detection tests.

Figure 2 Ratio of positive rapid antigen-detection tests results by week. RAT: Rapid antigen.

Figure 3 Ratio of false-negative rapid antigen-detection tests results by week.

Figure 4 Number of rapid antigen-detection tests false-negative patients testing positive per each reverse transcription-polymerase chain reaction cycle. Ct: Reverse transcription-polymerase chain reaction cycle.

Figure 5 Correlation between reverse transcription-polymerase chain reaction cycle values and prevalence of false-negative results.

Figure 6 Predictive model of correlation between the total number of patients and the number of false negatives.