FIG 3.

(A to D) Sensitivity of the SMF method compared to those of direct and concentrated AFB smear microscopy in a per-specimen analysis with MGIT culture as the reference standard. Only MGIT culture-positive specimens were included. Results show sensitivity by HIV infection status (n = 168; one HIV result was missing) (A), sputum volume (n = 168; one volume was missing) (B), sputum viscosity (visual determination) (C), and number of M. tuberculosis CFU in Lowenstein-Jensen (LJ) culture (n = 146; 23 specimens were negative or contaminated on LJ culture) (D).