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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.