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Table 6 HBV prevalence and heterogeneity in different periods

From: Hepatitis B virus infection among people who use drugs in Iran: a systematic review, meta-analysis, and trend analysis

Year

No. of studies

Sample size (Total)

HBV prevalence % (95 CI)

I2 (%)

PWID

 ≤ 2003

7

84

5.8 (3.5–9.4)

2

2004–2006

4

2093

8.2 (3.9–16.5)

2

2007–2009

8

2231

4.4 (3.7–5.4)

0

2010–2012

7

1682

3.9 (1.9–7.9)

9

2013–2015

4

845

2.7 (1.8–4.1)

0

 ≥ 2016

3

1434

3.1 (2.3–4.1)

0

Non-injecting PWUD

 ≤ 2003

1

149

1.3 (0.3–5.2)

−

2004–2006

3

430

3.3 (1.9–5.4)

0

2007–2009

2

539

3.0 (1.8–4.8)

0

2010–2012

2

252

1.2 (0.4–3.6)

0

2013–2015

2

3539

2.8 (2.3–3.4)

0

 ≥ 2016

1

3917

3.0 (2.6–3.6)

−

  1. Model: Random Effects Model