Index test (Focus) | Resolver test (Western blot) | Total | |||||
Positive | Negative | ||||||
Kalon | |||||||
Positive | Negative | Total | Positive | Negative | Total | ||
Positive | 0.612 | 0.068* | 0.680 | 0.045 | 0.075 | 0.120 | 0.800 |
Negative | 0.000 | 0.011 | 0.011 | 0.000 | 0.189 | 0.189 | 0.200 |
Total | 0.612 | 0.079 | 0.691 | 0.045 | 0.264 | 0.309 | 1.000 |
These steps were followed to calculate sensitivity and specificity for Focus: Step 1. Using data from table 1 fill each of the cells. For example,* the value for this cell is calculated as 0.143 (proportion of samples with this result, that is, 30/210 HerpeSelect positive, Kalon negative) × 0.474 (proportion of these samples correctly resolved on Western blot. ie, 9/19)=0.068. Step 2. HerpeSelect sensitivity is total positive out of total, that is, 0.680/0.691=98.3%. Similarly, specificity is total negative out of total samples, ie, 0.189/0.309=61.1%.