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Table 1 Summary of model parameters and the median and 95% credible interval from their fitted posterior distributions

From: Estimating the effectiveness of routine asymptomatic PCR testing at different frequencies for the detection of SARS-CoV-2 infections

Parameter Description Interpretation Posterior median (95% credible interval)
C Breakpoint of piecewise regression The time at which PCR positivity peaks 3.18 days post-infection (2.01 to 5.11)
β1 Intercept of both regression curves N/A 1.51 (0.80 to 2.31)
β2 Slope of 1st regression curve The rate of increase in percentage of infections detected after exposure 2.19 (1.26 to 3.47)
β3 Slope of 2nd regression curve The rate of decrease in the percentage of infections detected, after the curve peaks − 1.1 (− 1.2 to − 1.05)