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Table 3 Risk factors associated to PEARTI (Univariate analysis)

From: Post-exposure rate of tuberculosis infection among health care workers measured with tuberculin skin test conversion after unprotected exposure to patients with pulmonary tuberculosis: 6-year experience in an Italian teaching hospital

  N events Person years Rate (per 100 person years) Hazard ratio 95% confidence interval p
Age (for each year increase) 9 NA NA HR 1.12; 95% CI 1.03-1.22 0.01
Age at hire (for each year increase) 9 NA NA HR 1.008; 95% CI 0.93-1.09 0.83
Time since hire (for each year increase) 9 NA NA HR 1.06; 95% CI 0.99-1.13 0.08
Gender (male vs female) F 6 24.5 32.7 HR 0.29; 95% CI 0.04-2.35 0.25
M 3 10 10.3
Profession (physician vs nurse) Nurse 7 23.8 33.64 HR 0.45; 95% CI 0.09-2.17 0.32
Physician 2 11.8 16.9
Sputum smear of the index case (positive vs negative)* Negative 6 14.7 20.5 HR 1.59; 95% CI 0.04-6.3 0.58
Positive 3 19.6 30.7
History of BCG (positive vs negative) Negative 3 19.7 15.3 HR 2.84; 95% CI 0.71-11.34 0.14
  Positive 6 14.6 41.25   
  1. *The sputum smear result of the index case who was in contact with HCWs tested positive at T2.