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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