Fig 2. Bland Altman (BA) plot showing the relationship between Ct values of pooled versus individual samples.
BA plot was drawn to visualize the relationship between the individual Ct values of sample(s) in a pool with the mean Ct value of the positive sample(s) in the pool. BA lines (dashed lines) assign the mathematical expression of this discrepancy by obtaining the 95% CI of deviation from point estimate (0.42).