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. 2020 Nov 3;68(1):28–34. doi: 10.1016/j.jadohealth.2020.09.038

Figure 2.

Figure 2

Sensitivity analysis for primary outcomes with varying probabilities of COVID-19. Results among a population of 20,000 students. (A) Number of true positives; (B) Number of true negatives; (C) Number of RT-PCR tests. For A and C, green line represents Strategy 1: symptom-based screening only (NoS). Red line represents Strategy 2: symptom-based RT-PCR testing (Symp). Purple line represents Strategy 3: universal, single RT-PCR testing (All). Blue line represents Strategy 4: repeat RT-PCR based on symptoms (Re1). Pink line is Strategy 5: universal repeat RT-PCR testing (Re2). For B, green line represents Strategy 1, whereas mixed line represents Strategies 2–5. RT-PCR, reverse transcription polymerase chain reaction.