Table 3.

Factors Associated With Finding a Source Case for Children With TB in California*

Factor% Source
RR95% CIP Value
Child found in a contact investigation986.84.4–10.6<.001
Child not found in a contact investigation15
Born in the United States434.01.5–10.2.001
Age <1 y551.71.1–2.6.04
Age ≥1 y40
Other racial or ethnic group39
At least 1 parent born in the United States591.51.0–2.3.10
Neither parent born in the United States40
  • * Excludes 4 children infected with M bovis.

  • Excludes 10 children whose parents' birthplaces were unknown.