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Table 2 Proportion of positive tuberculin skin testing response stratified by the main collected variables

From: Latent tuberculosis infection and associated risk factors among undergraduate healthcare students in Italy: a cross-sectional study

Variables TST p-value
n (%), 95% CI
Gender Male 3/279 (1.1), -0.001 – 0.023 0.75
Female 7/454 (1.5), 0.004 – 0.026
Nationality Italian 6/692 (0.9), 0.002 – 0.016 0.001
Migrant 4/41 (9.8), 0.007 – 0.189
TB incidence of the country of birth* ≥20 cases per 100,000 population 4/12 (33.3), 0.066 – 0.600 <0.0001
<20 cases per 100,000 population 6/721 (0.8), 0.002 – 0.015
Potential professional exposure calculated without the interference of subjects coming from countries at high-incidence of TB Pre-clinical students 3/136 (2.2), -0.003 – 0.046 0.09
Clinical students 3/585 (0.5), -0.001 – 0.011
BCG immunization Not vaccinated 9/720 (1.3), 0.005 – 0.021 0.17
Vaccinated 1/13 (7.7), -0.068 – 0.222
  1. CI Confidence Intervals.
  2. BCG Bacille Calmette-Guérin.
  3. TST Tuberculin Skin Testing.
  4. *High Incidence: ≥20 cases per 100,000 population (according to reference 23).