Fig. 6

Funnel plot showing publication bias for the relationship between inter-pregnancy interval and perinatal mortality, Ethiopia. In Fig. 6: Each black dot represents a single study. The y-axis is the standard error of the effect estimate. The x-axis is transformed effect size (log odds ratio). Larger studies (large sample size) with higher power are placed towards the top and lower studies (small sample size) with lower power are placed at the bottom. Symmetrical distribution of dots on the both sides of the vertical line inside the triangle (funnel) shows relatively no publication bias (subjective)