Table 3 Comparison between Ziehl Neelson (ZN) and Light Emitting Diode-Fluorescence Microscopic technique (LED-FM) in detecting AFB (by smear quantification) during follow-up of TB patients in eight medical colleges of India
Smear grade of patient | ZN Microscopy 2011 | LED-FM 2012 | Change in percentage (95 % CI) | p-value | |||
|---|---|---|---|---|---|---|---|
n1 | % | n2 | % | ||||
Negative | 2604 | 95.0 | 2655 | 92.6 | −2.4 (−1.1 to −3.7) | <0.0001 | |
Positive | Scanty | 33 | 1.2 | 75 | 2.6 | 1.4 (0.7–2.0) | 0.0001 |
1+ | 57 | 2.1 | 78 | 2.7 | 0.6 (−0.1 to 1.4) | 0.14 | |
2+ | 29 | 1.1 | 27 | 0.9 | −0. 2 (−0. 7 to 0. 4) | 0.45 | |
3+ | 17 | 0.6 | 33 | 1.1 | 0.5 (0.0 to 1.0) | 0.01 | |
Total | 2740 | 100.0 | 2868 | 100.0 | – | – | |