Heterogeneity is most likely explained by the different interventions in the contributing trials and the considerable differences in effect sizes; three large trials in India and Pakistan found highly significant effects ( Bhutta 2011 ; Kumar 2008 ; Midhet 2010 ) while, other trials found no group differences.
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Health system and community level interventions for improving antenatal care coverage and health outcomes.
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The sentences
With respect to the proportion of women receiving at least four antenatal visits, all interventions had a more positive impact in low‐ and lower‐middle‐income countries, but this difference did not reach statistical significance.