Repeat IGRA testing in Canadian health workers: conversions or unexplained variability?
Using the conventional QFT conversion definition, we found a higher than expected rate of conversion. Recent occupational exposures were not associated with QFT conversions, and no TST conversions occurred in this cohort, suggesting the 'conversions' may not reflect new TB infection.
More men than women are admitted to ICUs; this difference is especially prominent in elderly patients.