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Table 2 Frequency and adjusted odds ratios (OR) and 95% confidence intervals (95% CI) for covariates associated with QFT-IT results

From: Risk of latent TB infection in individuals employed in the healthcare sector in Germany: a multicentre prevalence study

Covariates QFT-IT
Negative n/%
QFT-IT
Positive n/%
Odds Ratio 95% CI
Age **     
> 25 years 249 (98.4) 4 (1.6) 1  
25-35 years 449 (93.3) 32 (6.7) 3.8 1.3-11.2
35-45 years 524 (91.8) 47 (8.2) 4.4 1.6-12.5
45-55 years 440 (86.8) 67 (13.2) 7.6 2.7-21.4
> 55 years 144 (75.0) 48 (25.0) 15.1 5.3-43.4
Gender**     
Female 1392 (89.9) 156 (10.1) 1  
Male 414 (90.8) 42 (9.2) 1.2 0.8-1.7
Country of birth**     
Germany 1529 (91.7) 138 (8.3) 1  
Foreign-born 277 (82.2) 60 (17.8) 2.0 1.4-2.8
TB in own history**     
No 1792 (90.5) 188 (9.5) 1  
Yes 14 (58.3) 10 (41.7) 4.9 1.97-12.2
BCG vaccination     
No 995 (90.5) 104 (9.5) 1  
Yes 811 (89.6) 94 (10.4) 0.9 0.7-1.3
Profession     
Physicians 254 (90.4) 27 (9.6) 1  
Nurses 982 (90.3) 105 (9.7) 0.94 0.6-1.6
Administration staff 146 (85.4) 25 (14.6) 1.1. 0.5-2.2
Technicians and special ward staff 175 (90.2) 19 (9.8) 0.7 0.3-1.5-
Unknown 51 (86.4) 8 (9.9) 1.3 0.5-3.3
Social workers/auxiliaries 198 (93.4) 14 (6.6) 0.8 0.4-1.8
Workplace     
Other clinic ward 653 (90.6) 68 (9.4) 1  
Unknown 64 (92.8) 5 (7.2) 0.9 0.3-2.4
Admission ward 129 (93.5) 9 (6.5) 0.7 0.2-2.3
Infection ward 278 (91.7) 25 (8.3) 1.3 0.4-3.8
Geriatric care 272 (88.0) 37 (12.0) 1.7 0.6-4.9
Technicians 151 (85.8) 25 (14.2) 2 0.6-6.4
Administration 64 (85.3) 11 (14.7) 1.7 0.5-5.7
Intensive care/surgery room 195 (91.5) 18 (8.5) 1.1 0.9-3.3
Previous TST in medical history**     
Negative TST 961 (94.5) 56 (5.5) 1  
Positive TST 386 (80.4) 94 (19.6) 3.5 2.4-4.99
No TST 459 (90.5) 48 (9.5) 1.7 1.1-2.5
  1. ** The final multivariate logistics model includes the variables age, gender, TST in own history, TST history and country of birth.
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