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Table 2 Patterns of missing culture results for three-time windows following treatment initiation

From: Methods for handling missing data in serially sampled sputum specimens for mycobacterial culture conversion calculation

Time Window

Total

Conversiona

Weeks 0–3

Weeks 4–7

Weeks 8–11

N = 238

N = 141

   

N(%)

C

C

C

28 (11.8)

20 (14.3)

C

C

I

42 (17.6)

28 (20)

C

C

M

3 (1.3)

1 (0.7)

C

I

C

17 (7.1)

12 (8.6)

C

I

I

58 (24.4)

33 (23.6)

C

I

M

6 (2.5)

1 (0.7)

C

M

C

1 (0.4)

1 (0.7)

C

M

I

1 (0.4)

0 (0)

C

M

M

1 (0.4)

0 (0)

I

C

C

9 (3.8)

6 (4.3)

I

C

I

14 (5.9)

13 (9.3)

I

C

M

1 (0.4)

1 (0.7)

I

I

C

4 (1.7)

3 (2.1)

I

I

I

31 (13)

20 (14.3)

I

I

M

8 (3.4)

2 (1.4)

I

M

I

1 (0.4)

0 (0)

I

M

M

13 (5.5)

0 (0)

  1. C No samples missing, I 1–3 samples missing, M All samples missing
  2. a Conversion achieved if two consecutive cultures without Mycobacterium tuberculosis occurs