Prevalence of PTB per 100,000 population, by method of estimation, all clusters-using screening by symptoms alone.

( ): 95% confidence intervals.N: numbers included in analysis.∧: Reason for difference in numbers analyzed by three methods: for crude and cluster level prevalence, only those individuals from whom all actual data is available were considered for analysis; persons missed from screening for symptoms and persons who were eligible for sputum collection but one or both sputum specimen not collected or found contaminated on culture were excluded.