Volume 12, Number 5—May 2006
Tuberculosis Special Section
Multidrug-resistant Tuberculosis in Military Recruits
|Contact duration||Total||Old reactors||TSTs placed||New reactor||Reactor rate (%)||Group reactor rate (%)|
|Casual contacts*||Likely none||25||0||19||1||5.26||3.2|
|>3 weeks† Sep 13–Oct 12||70||1||70||3||4.29|
|1–3 weeks Oct 12–21||42||0||31||6||19.35|
|<1 week Oct 21–26||12||0||9||3||33.33|
*The close contacts were more likely to convert than the incidental contacts. Risk ratio (RR) 2.86, 95% confidence interval (CI) 1.22–6.74, p = 0.011.
†The close contacts with >3 weeks of exposure were less likely to convert than those with <3 weeks of exposure. RR 0.19, 95% CI 0.05–0.66, p = 0.0032.