Quantification of the effects of reporting errors in MWS anthropometry and reproductive history variables. Means and 95% confidence intervals for NSHD variables are plotted against means of corresponding MWS variables, within selected categories of the MWS data. Category boundaries are given on the horizontal axes. Pearson correlation coefficients (r) are indicated for each variable, as are regression dilution ratios (RDR) with 95% bootstrapped confidence bounds, indicating the likely relative attenuation of linear coefficients for disease-exposure associations. The dashed lines are lines of equality of means.