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Body mass index (BMI) measured by anthropometry compared to BMI assigned based on centiles of the distribution for white women between ages 30 and 3536 by self-reported figure sizes 2 through 8 (Spearman's ρ=0.85, p<0.001). Mean difference (Δ), standard deviation (SD), and p value based on paired t test comparing measured BMI and assigned BMI based on exact centiles (Δ=1.46, SD 3.84, p<0.001) or midpoint of centiles (Δ=−0.43, SD 3.75, p=0.19). CI, confidence interval.
