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Table 1 Contribution of sputum smear positivity by the three sputum smears (The italic numbers indicate the sensitivity of that single sputum as compared to the standard two positive smears)

From: The value of one versus three sputum smear examinations for diagnosis of pulmonary tuberculosis in Asella hospital, South-East Ethiopia

AFB status   Spot 1 Morning Spot 2
Positive Negative Positive Negative Positive Negative
Positive (n = 637) Count 616 21 635 2 618 19
% 96.7 3.3 99.7 0.3 97 3
Negative (n = 6375) Count 2 6373 3 6372 4 6371
% 0 100 0 100 0.1 99.9
Total (n = 7012) Count 618 6394 638 6374 622 6390