Volume 12, Number 9—September 2006
Research
Risk for Tuberculosis among Children
Hiroshi Nakaoka*, Lovett Lawson*†, S. Bertel Squire*, Brian Coulter*, Pernille Ravn‡, Inger Brock‡, C. Anthony Hart§, and Luis E. Cuevas*
Table 1
Characteristics of children by study group*
| Characteristic | Controls (N = 46), no. (%) | Smear status of index case-patients | p value† | |
|---|---|---|---|---|
| Smear-negative tuberculosis (n = 83), no. (%) | Smear-positive tuberculosis (n = 78), no. (%) | |||
| Mean (SD) age, y | 6.2 (3.5) | 7.5 (3.8) | 7.9 (3.8) | 0.04 |
| Male/female (% male) | 22/24 (48) | 39/44 (47) | 34/44 (44) | NS |
| History of Mycobacterium bovis BCG | 42 (91) | 77 (93) | 68 (87) | NS |
| BCG scar present | 18 (39) | 39 (47) | 19 (24) | 0.01 |
| Relationship to index case-patient | ||||
| Son or daughter | NA | 47 (57) | 59 (76) | <0.01 |
| Grandchild | NA | 7 (8) | 0 | |
| Sibling | NA | 9 (11) | 15 (19) | |
| Niece or nephew | NA | 14 (17) | 4 (5) | |
| Other | NA | 6 (7) | 0 | |
| Mean (SD) hours in contact per day | NA | 9.6 (4.9) | 11.2 (5) | 0.04 |
| Shares bedroom with index case | NA | 28 (34) | 50 (64) | <0.01 |
| Mean (SD) number people per bedroom | 4.4 (1.8) | 3.3 (1.2) | 4.3 (2) | <0.01 |
*SD, standard deviation; NS, not significant; NA, not applicable.
†Comparison of proportions and means between the 3 groups unless data do not apply to the control group.
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