BCG vaccination at three different age groups: response and effectiveness

Table 1 No (%) of BCG scar formations in three groups of different post vaccination tuberculin reactions among school children

Mantoux	Children	Evaluation of scar formation [n (%)]
Induration (mm)	n	Real scar (>2 mm)	Tiny scar (≤ 2 mm)	No scar (?)
Negative (0–3,9)	43	17 (39.5)*	20 (46.5),*	6 (14)*,*
Weak positive (4–5,9)	45	32 (71.1)	13 (28.9),*	0 (0)*,*
Positive (>6)	1036	1030 (99.4)*	6 (0.6)*,*	0 (0)*,*
Total	1124	1079 (96.0)	39 (3.5)	6 (0.5)

p values apply to differences among negative, weak positive and positive indurations for the same scar formation groups (real scar, tiny or not visible scar).
* < 0.01, ** p < 0.025, *** p < 0.001.