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Table 2 Pearson correlation matrix among trends of preterm live birth characteristics, fertility rate and fetal mortality ratio. State of São Paulo. 2000–2010

From: What is the impact of interventions that prevent fetal mortality on the increase of preterm live births in the State of Sao Paulo, Brazil?

Variables Preterm live birth less than 36 weeks % mothers lest than 4 prenatal appointments % multiple gestation % mothers less than 8 years schooling Fertility rate of women of 35 years and over Fetal mortality ratio
% mothers less than 4 prenatal appointments −0.866      
% multiple gestation 0.915 −0.886     
% mothers less than 8 years schooling −0.969 0.949 −0.950    
fertility rate of women of 35 years and over 0.967 −0.925 0.948 −0.995   
fetal mortality ratio −0.953 0.969 −0.910 0.979 0.960  
% live birth by cesarean 0.984 −0.922 0.941 −0.996 0.993 −0.971
  1. p < 0.001 for all correlation coefficients
  2. Source: Ministry of Health of Brazil