Yield of first and Incremental yield of the second and third serial sputum culture.

LJ (Solid culture) = Lowenstein Jensen, MGIT (Liquid culture) = Mycobacterium Growth Indicator Tube.¥ = Number of estimated TB cases missed among those who never submitted the 2nd and 3rd sputum sample for culture, assuming a same proportion of TB cases as in those who submitted the 2nd and 3rd sputum for culture, respectively. † = The proportion of TB cases expected if each of the suspects had a complete set of three sputum cultures, Π = Total positives observed + total positives missed, ‡1 = Px/Exp, ‡2 = NPx + missed by second/ExP and ‡3 = NNP + missed by third/Exp.