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.