Table 3.
Mean Difference Between Self-Reported and Measured Weight (kg), by Selected Variablesa
| Characteristic | Age 16-49 y, Mean (95% CI) | Age 50-69 y, Mean (95% CI) | Age ≥70 y, Mean (95% CI) |
|---|---|---|---|
| Sex | |||
| Male | 0.31 (0.10, 0.52) | 0.13 (−0.06, 0.33) | 0.73 (0.52, 0.93) |
| Female | −1.63 (−1.80, −1.46) | −1.25 (−1.47, −1.03) | −0.39 (−0.56, −0.23) |
| Annual household income, $ | |||
| <20,000 | −0.85 (−1.20, −0.50) | −0.30 (−0.65, 0.04) | 0 (−0.30, 0.30) |
| 20,000-34,999 | −0.46 (−0.70, −0.23) | −0.21 (−0.61, 0.18) | 0.35 (0.02, 0.69) |
| 35,000-54,999 | −0.83 (−1.10, −0.55) | −0.40 (−0.73, −0.08) | 0.05 (−0.27, 0.36) |
| 55,000-74,999 | −0.59 (−0.89, −0.29) | −0.98 (−1.40, −0.56) | −0.38 (−0.78, 0.02) |
| ≥75,000 | −0.60 (−0.80, −0.41) | −0.84 (−1.07, −0.60) | −0.22 (−0.64, 0.20) |
| Not reported | −0.81 (−1.27, −0.36) | −0.63 (−1.15, −0.11) | 0.29 (−0.18, 0.76) |
| Body mass index (kg/m2) | |||
| Underweight (<18.5) | 2.25 (1.90, 2.60) | 1.21 (0.08, 2.34) | 1.77 (1.26, 2.27) |
| Normal (18.5-24.9) | 0.58 (0.42, 0.75) | 0.59 (0.41, 0.78) | 0.90 (0.63, 1.16) |
| Overweight (25.0-29.9) | −0.65 (−0.83, −0.48) | −0.20 (−0.40, −0.01) | −0.04 (−0.21, 0.14) |
| Obese (≥30.0) | −2.61 (−2.94, −2.29) | −1.81 (−2.14, −1.48) | −0.92 (−1.22, −0.63) |
Abbreviation: CI, confidence interval.
a
Data source: NHANES, 2001-2006. Estimates were weighted to produce unbiased national estimates. Bolded items are significant (P < .05) across the levels of the respective variables.