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Table 6 Assessment of risk of bias for observational studies using the Newcastle–Ottawa scale

From: Impact of Plasmodium falciparum malaria and intermittent preventive treatment of malaria in pregnancy on the risk of malaria in infants: a systematic review

Author, year of publication (ref) Selection Comparability Outcome Total Overall risk of bias
REC SNEC ME DON AME AI AO FL CF
Tassi Yunga, 2018 [34] * * * * * * * 7 High
Boudova,, 2017 [40] * * * * * * * 7 High
Sylvester, 2016 [41] * * * * * * 6 High
De Beaudrap, 2016 [37] * * * * * * * * 8 High
Apinjoh, 2015 [36] * * * * * * 6 High
Ndibazza, 2013 [39] * * * * * * * * 8 High
Borgella, 2013 [18] * * * * * * * * 8 High
Asante, 2013 [20] * * * * * * * * * 9 Medium
Le Port, 2011 [35] * * * * * * * * * 9 Medium
Schwarz, 2008 [17] * * * * * * * 7 High
Mutabingwa, 2005 [21] * * * * * * * * 8 High
  1. REC representativeness of the exposed cohort, SNEC selection of the non-exposed cohort ME measurement of exposure to malaria during pregnancy, DON demonstration that the outcome of interest was not present at the start of the study, AME adjusted for malaria transmission exposure AI adjusted for IPTp or insecticide treated net use, AO assessment of the outcome FL follow-up long enough for outcome to occur, CF completeness of follow-up
  2. –, score of zero; *, score of one