Negligible Low     Average     High     Extremely High Can not be judged         Total        
(n=90)   (n=36)   (n=0)   (n=4)   (n=46)   (n=180)  
Tuberculin Skin Test         Likelihood p-value
  ratio
  Score I (<5)  
  n % n % n % n % n % n % n %    
90 100.00 36 100.00 0 0.00 3 75.00 46 100.00 1 25.00 176 97.78    
LLR χ2(8)=  
TST Score Score II (5-9) 0 0.00 0 0.00 0 0.00 1 25.00 0 0.00 0 0.00 1 0.56   <0.001
  33.865  
  Missed 0 0.00 0 0.00 0 0.00 0 0.00 0 0.00 3 75.00 3 1.67    
  0 (Negative- 85 94.44 36 100.00 0 0.00 3 75.00 45 97.83 1 25.00 170 94.44
No reaction)
   
TST <5 (Reactive- 5 5.56 0 0.00 0 0.00 0 0.00 1 2.17 0 0.00 6 3.33 2  
Normal)    
cutaneous in duration  size (mm)
                              <0.001
   
  37.947
5-9 (Reactive- 0 0.00 0 0.00 0 0.00 1 25.00 0 0.00 0 0.00 1 0.56
   
     
Borderline)
    Missed 0 0.00 0 0.00 0 0.00 0 0.00 0 0.00 3 75.00 3 1.67    
TST   adverse   reaction   No   90 100.00 36 100.00 0 0.00 4 100.00 46 100.00 1 25.00 177 98.33 LLR χ2(4)=   <0.001
Missed 0 0.00 0 0.00 0 0.00 0 0.00 0 0.00 3 75.00 3 1.67 26.017  
   
Average LTBI category is zero (means no detected cases), Missed=excluded case due to missed follow-up or came after 5 days for reading of TST reaction, cannot be judged means excluded cases (3 missed follow-up for TST results and one pregnant female not preformed chest X-ray due to contraindication)
Table 3: Distribution of tuberculin skin test results according to latent tuberculosis infection categories of 180 new immigrants to Kuwait, February-May, 2010.