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Table 1 Bivariable analysis of risk factors associated with tuberculin skin testing positivity.

From: Prevalence and predictors of tuberculin skin positivity in Hellenic Army recruits

  TST (-) [N = 916] TST (+) [N = 37] P – value
Variables Mean ± SD or n (%)  
Age, (years) 23.5 ± 6.5 24.3 ± 4.6 0.30
Body weight, (kg) 80.9 ± 14.7 76.3 ± 13.1 0.047
Height, (m) 1.79 ± 0.07 1.78 ± 0.07 0.07
Body-mass index, (kg/m2) 25.2 ± 4.4 24.0 ± 4.0 0.10
Smoking, (packets-per-year) 2.8 ± 4.1 3.2 ± 5.4 0.69
Repatriation 40/916 (4.3 %) 13/37 (24.5 %) <0.001
Current residence    0.07
   Urban 445/916 (48.6%) 25/37 (67.6%)  
   Semi-urban 203/916 (22.2%) 6/37 (16.2%)  
   Rural 268/916 (29.2%) 6/37 (16.2%)  
EGP social class*    0.78
I 28/660 (4.2%) 1/28 (3.6%)  
II 42/660 (6.3%) 3/28 (10.7%)  
III 224/660 (33.9%) 9/28 (32.2%)  
IV 115/660 (17.4%) 3/28 (10.7%)  
V 12/660 (18.2%) 0/28 (0%)  
VI 119/660 (18.0%) 4/28 (14.3%)  
VII 120/660 (18.2%) 8/28 (28.6%)  
  1. Abbreviations: EGP: Erikson Goldthorpe Portocarero social class scheme (it refers to the socioeconomic status of the recruits' parents); TST: tuberculin skin test; SD: standard deviation
  2. * Data were not available for all studied participants