Rates of leprosy separately for calendar year during the follow-up period among those with 1 BCG scar.

aUntil August 2006.bBased on Poisson regression with robust variance estimator specifying school as cluster, and controlled for incidence of tuberculosis and NCDR of leprosy in geographical areas before the trial (all as categorical variables as in Table 1), sex, and year of birth. All estimates excluding 870 school children (being 2 leprosy cases in control group, 1 in 1999 and other in 2005�C6, both PB cases) who had no data for tuberculosis and/or leprosy in geographical area.