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Table 2 Pooled data for all active TB and confirmed active TB among contacts, by age group

From: The yield of tuberculosis contact investigation in low- and middle-income settings: a systematic review and meta-analysis

Subgroups

Studies (n)

Pooled % yield (95% confidence interval)

All active TB

  < 5y

32

6.84% (5.56–8.11, I2 95.95%)

 5–14y

11

3.13% (2.11–4.16, I2 85.81%)

  < 15y

28

3.59% (2.72–4.46, I2 95.30%)

  ≥ 15y

26

3.69% (3.0–4.37, I2 91.81%)

Confirmed active TB

  < 5y

10

0.73% (0.24–1.22, I2 79.03%)

 5–14y

5

3.43% (1.02–5.85, I2 76.27%)

  < 15y

15

1.65% (1.03–2.27, I2 86.85%)

  ≥ 15y

20

3.22% (2.27–4.17, I2 91.23%)