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Comparison of T-cell response frequencies to PPD in the IFN-γ-ELISpot assay versus TST
| TST response | T-cell response frequency (%) to E-PPDa
|
Total no. tested | |
|---|---|---|---|
| − | + | ||
| − | 17 (48.57) | 18 (51.43) | 35 |
| + | 2 (11.76) | 15 (88.24) | 17 |
| Total | 19 | 33 | 52 |
IFN-γ-ELISPOT assay with PPD as antigen. Concordance κ = 0.30; 95% CI = 0.09 to 0.50. −, Negative result; +, positive result. Values in boldface indicate specificity and sensitivity.
