Table 1—

Study population for comparison interferon-γ release assay with tuberculin skin test

n%
Age
 16–29 yrs44336.4
 30–39 yrs33627.6
 40–49 yrs21217.4
 50–59 yrs19916.3
 ≥60 yrs282.3
Sex
 Female87872.1
 Male34027.9
BCG vaccination
 Only at birth37030.4
 1 additional42635.0
 2 additional30124.7
 ≥3 additional1219.9
Years since last BCG
 >15 yrs92075.5
 >10–15 yrs22718.6
 1–10 years715.8
Profession
 Administrator18615.3
 Auxiliaries, cleaning staff18815.4
 Technicians (radiology, lab, etc.)857.0
 Nurses54845.0
 Physicians21117.3
Risk assessment
 Low risk17314.2
 Moderate risk40733.4
 High risk63852.4
Time working in healthcare
 Start of work20817.1
 <5 yrs30127.7
 5–<10 yrs21217.4
 10–<15 yrs14211.7
 15–<20 yrs907.4
 ≥20 yrs26521.8
  • BCG: bacillus Calmette–Guérin.