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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