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Median percentages of participants with BCG scars by age group. Numbers of participants in the different subgroups are as follows: <0.5 years old, 48; 0.5 to <1 year old, 42; 1 to <5 years old, 96; 5 to <13 years old, 40; 13 to <21 years old, 64; 21 to <31 years old, 181; 31 to <41 years old, 150; 41 to 51 years old, 53; and 51 to 61 years old, 13.
