Fig. 1

Graphs comparing respondent reported birth weight vs chart obtained birth weight. a Bland–Altman plot displaying differences between respondents reported birth weight and actual birth weight of the adolescents versus the mean of the respondents self-reported and actual birth weights of the adolescent; 95% limits of agreement are the dashed lines and the regression line is the solid black line. b Scatterplot of chart obtained birth weight compared to respondent reported birth weight