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Table 4 Risk of Bias assessment for included studies

From: A systematic review of the epidemiology of hepatitis A in Africa

Author, Year Risk of Bias Hoy et al. tool Score Score Description
Abdulla et al., 2010 [22] Low 10  
Afegbua et al., 2013 [27] Low 8 1) Selection of research location was convenience and not justified as generalizable to entire population; 2) No description of how survey was conducted is given
Al-Aziz et al., 2008 [28] Low 9 1) Selection of research location was convenience and not justified as generalizable to entire population
Blanchi et al., 2014 [23] Low 10  
Bonney et al., 2013 [29] Low 9 1) Selection of research location was convenience and not justified as generalizable to entire population
Bouskraoui et al., 2009 [30] Low 10  
Burrous et al., 2010 [31] Low 10  
El-Karasksy et al., 2008 [32] Low 9 1) Selection of research location was convenience and not justified as generalizable to entire population
Ellis et al., 2008 [33] Low 10  
Enoch et al., 2019 [21] Low 10  
Forbi et al., 2012 [34] Low 9 1) Selection of research location was convenience and not justified as generalizable to entire population
Forbi et al., 2012_2 [35] Low 9 1) Selection of research population was not justified as generalizable to entire population
Guenifi et al., 2017 [36] Low 9 1) Selection of research population was not justified as generalizable to entire population
Ikobah et al., 2015 [37] Low 9 1) Selection of total anti-HAV antibody testing may confound results
Jablonka et al., 2017 [38] Low 10  
Klouwenberg et al., 2011 [39] Low 9 1) Selection of research population was not justified as generalizable to entire population
Lopes et al., 2017 [40] Low 9 1) Years of data collection not described in publication
Louati et al., 2009 [41] Low 10  
Majori et al., 2008 [26] Low 9 1) Selection of research population was not justified as generalizable to entire population
Mazanderani et al., 2018 [11] Low 10  
Mphaka et al., 2016 [42] Low 8 1) Selection of research population was not justified as generalizable to entire population; 2) No random selection or census undertaken
Murchiri et al., 2012 [43] Low 8 1) Purposive sampling leads to selection bias; 2) Selection of research population was not justified as generalizable to entire population
Nagu et al., 2008 [44] Low 9 1) Selection of research population was not justified as generalizable to entire population
Neffatti et al., 2017 [45] Low 10  
Ogefere et al., 2016 [46] Low 9 1) Sampling method may have led to selection bias
Raabe et al., 2014 [24] Low 9 1) Selection of research population was not justified as generalizable to entire population
Rabenau et al., 2010 [47] Low 9 1) Selection of research population was not justified as generalizable to entire population
Rezig et al., 2008 (55) Low 10  
Smahi et al., 2009 (56) Low 10  
Sule et al., 2013 (57) Low 9 1) Selection of research population was not justified as generalizable to entire population
Tantawy et al., 2012 (58) Low 10  
Traore et al., 2012 (59) Low 9 1) Selection of research location was convenience and not justified as generalizable to entire population