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Table 2 Assessment of quality of studies providing prevalence rates among blood donors and pregnant women

From: Systematic review and meta-analysis of HIV, HBV and HCV infection prevalence in Sudan

Aspect Score Description
Coverage 1 Single centre/local
2 Multi-centre/local
3 Multi-centre/national
Sample sizea 0 Less than 150 participants
1 More than 150 and less than 1000 participants
2 More than 1000 participants
  1. aThresholds were set based on authors opinion solely