Negligible Low   Average High   Extremely High Can not be judged Total        
BCG  vaccination  against     Likelihood p-value
 
TB     (n=90) (n=36) (n=0) (n=4) (n=46) (n=4) (n=180) ratio  
     
      n % n % n % n % n % n %   n %    
History of BCG vaccination Yes 78 87 28 77.78 0 0 4 100.00 41 89 3 75.00 154 85.56    
                              LLR χ2(8)=  
  10 11 7 19.44 0 0 0 0.00 5 11 1 25.00 23 12.78 0.706
No
5.470  
                                 
Unknown 2 2 1 2.78 0 0 0 0.00 0 0 0 0.00   3 1.67  
 
                                     
Age  of  BCG vaccination Median 5.00 (2) 6.00 (3) - - 7.50 (6) 5.00 (2) 4.00 (-)   5 (2) KW χ2(4)= 0.504  
(IQR) 3.330      
(years)  
                                   
Presence of Positive 79 87.78 27 75.00 0 0 4 100.00 41 89.13 4 100.00 155 86.11 LLR χ2(4)=    
0.192  
BCG scar Negative 11 12.22 9 25.00 0 0 0 0.00 5 10.87 0 0.00 25 13.89 6.104  
Animal exposure in mother country Yes 51 56.67 18 50 0 0 1 25.00 24 52.17 0 0.00 94 52.22
LLR χ2(4)= 0.094  
7.928  
No 39 43.33 18 50 0 0 3 75.00 22 47.83 4 100.00 86 47.78  
Having cow? Yes 16 17.78 5 14 0 0 0 0.00 7 15.22 0 0.00 28 15.56 LLR χ2(4)= 0.539  
  No     74     82.22     31     86     0     0     4     100.00     39     84.78     4                100.00     152     84.44    
3.114        
Table 4: Distribution of Bacillus Calmette-Guérin (BCG) vaccination status against tuberculosis according to latent tuberculosis infection categories of 180 new immigrants to Kuwait, February-May, 2010.