Table 2.
Mean Difference Between Self-Reported and Measured Height, Weight, and BMI in Men and Women, by Selected Characteristicsa
| Characteristic | No. of Participants | Height, cm, Mean 95% CI | Weight, kg, Mean (95% CI) | BMI, kg/m2, Mean (95% CI) |
|---|---|---|---|---|
|
| ||||
| Men | ||||
|
| ||||
| Age, y | ||||
| 16-29 | 2800 | 0.97 (0.77, 1.16) | 0.37 (0.07, 0.68) | −0.21 (−0.33, −0.08) |
| 30-39 | 1076 | 0.91 (0.70, 1.11) | 0.34 (0.07, 0.60) | −0.23 (−0.35, −0.12) |
| 40-49 | 1193 | 0.75 (0.57, 0.93) | 0.21 (−0.12, 0.53) | −0.24 (−0.35, −0.13) |
| 50-59 | 912 | 1.20 (1.02, 1.38) | 0.07 (−0.19, 0.33) | −0.42 (−0.53, −0.32) |
| 60-69 | 964 | 1.94 (1.71, 2.17) | 0.24 (−0.03, 0.51) | −0.63 (−0.74, −0.51) |
| 70-79 | 788 | 2.54 (2.28, 2.80) | 0.57 (0.34, 0.81) | −0.66 (−0.75, −0.57) |
| ≥80 | 475 | 3.88 (3.55, 4.21) | 1.10 (0.80, 1.40) | −0.85 (−1.01, −0.69) |
| Race/ethnicity | ||||
| Hispanic | 2011 | 0.70 (0.47, 0.93) | 0.10 (−0.19, 0.38) | −0.22 (−0.33, −0.11) |
| White, non-Hispanic | 3942 | 1.34 (1.21, 1.47) | 0.33 (0.15, 0.50) | −0.37 (−0.43, −0.31) |
| Black, non-Hispanic | 1953 | 1.18 (1.02, 1.35) | 0.55 (0.16, 0.95) | −0.24 (−0.38, −0.10) |
| Other | 302 | 0.66 (0.25, 1.08) | −0.16 (−0.75, 0.43) | −0.30 (−0.57, −0.03) |
| Annual household income, $ | ||||
| <20,000 | 1650 | 1.21 (0.91, 1.51) | 0.75 (0.34, 1.15) | −0.16 (−0.34, 0.02) |
| 20,000-34,999 | 1761 | 1.55 (1.34, 1.75) | 0.69 (0.42, 0.95) | −0.31 (−0.40, −0.22) |
| 35,000-54,999 | 1635 | 1.35 (1.14, 1.55) | 0.26 (−0.01, 0.53) | −0.40 (−0.50, −0.30) |
| 55,000-74,999 | 946 | 1.19 (0.95, 1.43) | 0.08 (−0.26, 0.43) | −0.42 (−0.53, −0.32) |
| ≥75,000 | 1737 | 0.95 (0.82, 1.08) | 0.05 (−0.21, 0.31) | −0.34 (−0.44, −0.24) |
| BMI, kg/m2 | ||||
| Underweight (<18.5) | 273 | 0.87 (0.47, 1.26) | 3.71 (3.03, 4.39) | 0.97 (0.73, 1.21) |
| Normal (18.5-24.9) | 2695 | 0.85 (0.68, 1.02) | 1.69 (1.50, 1.87) | 0.29 (0.20, 0.38) |
| Overweight (25.0-29.9) | 3055 | 1.29 (1.17, 1.42) | 0.29 (0.11, 0.47) | −0.35 (−0.41, −0.29) |
| Obese (≥30.0) | 2185 | 1.50 (1.35, 1.64) | −1.32 (−1.65, −1.00) | −1.05 (−1.16, −0.94) |
|
| ||||
| Women | ||||
|
| ||||
| Age, y | ||||
| 16-29 | 3097 | 0.51 (0.38, 0.64) | −1.99 (−2.23, −1.74) | −0.94 (−1.04, −0.85) |
| 30-39 | 1260 | 0.50 (0.32, 0.68) | −1.45 (−1.76, −1.15) | −0.77 (−0.90, −0.64) |
| 40-49 | 1163 | 0.12 (−0.03, 0.30) | −1.36 (−1.70, −1.01) | −0.62 (−0.77, −0.47) |
| 50-59 | 885 | 0.47 (0.31, 0.63) | −1.41 (−1.74, −1.08) | −0.78 (−0.92, −0.64) |
| 60-69 | 994 | 1.13 (0.91, 1.34) | −1.00 (−1.25, −0.76) | −0.85 (−0.97, −0.72) |
| 70-79 | 653 | 1.69 (1.37, 2.01) | −0.55 (−0.76, −0.34) | −0.85 (−0.97, −0.73) |
| ≥80 | 554 | 3.09 (2.73, 3.46) | −0.13 (−0.44, 0.17) | −1.08 (−1.24, −0.93) |
| Race/ethnicity | ||||
| Hispanic | 2099 | 1.18 (0.88, 1.47) | −1.16 (−1.43, −0.89) | −0.91 (−1.08, −0.73) |
| White, non-Hispanic | 4154 | 0.56 (0.46, 0.67) | −1.38 (−1.53, −1.23) | −0.76 (−0.83, −0.70) |
| Black, non-Hispanic | 1991 | 0.79 (0.65, 0.92) | −1.69 (−2.03, −1.35) | −0.99 (−1.12, −0.85) |
| Other | 362 | 1.03 (0.67, 1.38) | −1.29 (−1.67, −0.92) | −0.87 (−1.06, −0.68) |
| Annual household income, $ | ||||
| <20,000 | 2080 | 1.23 (1.06, 1.41) | −1.48 (−1.73, −1.24) | −1.05 (−1.15, −0.95) |
| 20,000-34,999 | 1765 | 0.9 (0.71, 1.08) | −1.11 (−1.35, −0.87) | −0.77 (−0.88, −0.66) |
| 35,000-54,999 | 1539 | 0.58 (0.38, 0.79) | −1.55 (−1.89, −1.22) | −0.83 (−0.98, −0.69) |
| 55,000-74,999 | 969 | 0.49 (0.31, 0.67) | −1.46 (−1.82, −1.09) | −0.77 (−0.93, −0.61) |
| ≥75,000 | 1715 | 0.28 (0.13, 0.43) | −1.41 (−1.64, −1.18) | −0.67 (−0.78, −0.57) |
| BMI, kg/m2 | ||||
| Underweight (<18.5) | 371 | 0.36 (0.08, 0.64) | 1.16 (0.88, 1.44) | 0.32 (0.22, 0.44) |
| Normal (18.5-24.9) | 2925 | 0.35 (0.23, 0.47) | −0.2 (−0.30, −0.09) | −0.2 (−0.26, −0.15) |
| Overweight (25.0-29.9) | 2459 | 0.89 (0.73, 1.06) | −1.46 (−1.68, −1.23) | −0.88 (−0.97, −0.79) |
| Obese (≥30.0) | 2851 | 0.92 (0.77, 1.07) | −2.99 (−3.30, −2.68) | −1.58 (−1.70, −1.46) |
Abbreviations: BMI, body mass index; 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.