Table 3. Performance of proficiency panel participated TB microscopy testing sites (N = 80).

Facility performance	Number and % of laboratories	Liberia NLTCP scale	WHO recommended scale
Poor	9 (11%)	0–55	<65
Fair	8 (10%)	60–65	65–70
Fairly good	19 (24%)	70–75	70–80
Good	25 (31%)	80–85	80–85
Very good	18 (23%)	90–95	85–95
Excellent	2 (2%)	100	>95
Total number	80 (100%)