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Table 3 Adjusted* effect of the time (trend) and ethnic group on birthweight (g) and length at birth (mm) of Chilean newborns, 2000-2004

From: Absence of disparities in anthropometric measures among Chilean indigenous and non-indigenous newborns

  Change in birthweight (g) 95% confidence interval Change in birth length (mm) 95% confidence interval
Tendency (years) ** 1.99 1.45, 2.52 0.05 0.03, 0.08
Indigenous surname 12.45 9.39, 15.51 -0.17 -0.31, -0.03
R-squared 0.39   0.46  
  1. * adjusted for gestational age, gestational age squared, maternal age, maternal age squared, mother's years of education, rural/urban residence, and sex of the child.
  2. ** Tendency: annual change