Feasibility and validity of a statistical adjustment to reduce self-report bias of height and weight in wave 1 of the Add Health study

Table 3 Sensitivity and specificity of BMI based on self-reported and on proposed corrected height and weight at Wave 2 by sex, using measured values at Wave 2 as the reference standard

	Sensitivity (%) [95 % CI]		Specificity (%) [95 % CI]		Positive Predictive Value [95 % CI]		Negative Predictive Value [95 % CI]
	SR	Corrected	SR	Corrected	SR	Corrected	SR	Corrected
Male
OW or OB (BMI ≥25)	0.877 [0.861,0.892]	0.880 [0.864,0.895]	0.954 [0.947,0.959]	0.951 [0.944,0.957]	0.872 [0.856,0.889]	0.866 [0.850,0.882]	0.955 [0.949,0.961]	0.956 [0.950,0.962]
OB (BMI ≥30)	0.811 [0.785,0.836]	0.829 [0.803,0.853]	0.983 [0.979,0.986]	0.978 [0.974,0.982]	0.881 [0.857,0.901]	0.856 [0.831,0.878]	0.971 [0.966,0.975]	0.973 [0.969,0.977]
Female
OW or OB (BMI ≥25)	0.839 [0.821,0.856]	0.873 [0.857,0.889]	0.973 [0.968,0.977]	0.955 [0.949,0.960]	0.911 [0.896,0.924]	0.864 [0.847,0.880]	0.948 [0.942,0.954]	0.958 [0.952,0.963]
OB (BMI ≥30)	0.738 [0.706,0.769]	0.797 [0.767,0.825]	0.989 [0.986,0.992]	0.983 [0.979,0.986]	0.894 [0.868,0.917]	0.849 [0.820,0.874]	0.969 [0.964,0.973]	0.975 [0.971,0.979]

Proposed statistical adjustments were applied separately to height and weight prior to calculating the corrected BMI. Sensitivity reflects the true positive rate; specificity reflects the true negative rate. Bolded values indicate no overlap between pairs of confidence intervals for SR and corrected BMI
Abbreviations: OW overweight, OB obesity, BMI body mass index, CI confidence interval, SR self-reported

ISSN: 1471-2288