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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

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

  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]
  1. 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
  2. Abbreviations: OW overweight, OB obesity, BMI body mass index, CI confidence interval, SR self-reported