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Correlation between TST diameter (mm) and QFT-GIT results*
| IGRA | p-value | ||||
|---|---|---|---|---|---|
| Negative | Positive | ||||
| n. | % | n. | % | ||
| TST diameter (n.) | |||||
| 0–9 (29) | 29 | 100.0 | - | - | 0.001 |
| 10–15 (75) | 57 | 76.0 | 18 | 24.0 | |
| > 15 (51) | 37 | 72.5 | 14 | 27.5 | |
*p-value refers to the Fisher exact test to compare the frequency distribution of positive and negative QFT-GIT for three increasing diameter ranges
