Mantoux Score grade LTBI diagnosis Final result n (%)
response (mm)
       
0   I Negative(no reaction) Normal 170 (96.04%)
1 - < 5 II Normal (reactive) Normal 6 (3.38%)
           
5 - < 10 III Borderline Normal 1 (0.05%)
10 - < 15 IV Positive Abnormal 0 (0.00%)
15 - < 20 V Highly positive Abnormal 0 (0.00%)
> 20 VI Definite Abnormal 0 (0.00%)
Excluded - Cannot be judged - 3 (1.66%)
Modified ‘cut-off’ point value of TST induration was more than 10 mm, score (-)=no score for excluded case (due to missed follow-up or result reading after 5days), mm=millimetre induration
Table 2: Skin test response and score frequency of latent tuberculosis infection of the 180 new immigrants to Kuwait, February-May, 2010.