Table 2.
Summary statistics and correlation coefficients for self-reported and measured height, weight and BMI
| Variables | Collection method | p valuea | Correlation coefficient | |
|---|---|---|---|---|
| Self-reported | Measured | ICC (95 % CI)b | ||
| All (n = 140) | ||||
| Height (cm) | 170.3 ± 9.4 | 170.1 ± 9.1 | 0.066 | 0.990 (0.986–0.993)* |
| Weight (kg) | 71.6 ± 13.9 | 72.3 ± 14.3 | <0.0001 | 0.993 (0.991–0.995)* |
| BMI (kg m−2) | 24.6 ± 3.8 | 24.9 ± 3.9 | <0.0001 | 0.983 (0.977–0.988)* |
| By sex | ||||
| Women (n = 79) | ||||
| Height (cm) | 164.2 ± 6.4 | 164.3 ± 6.1 | 0.084 | 0.974 (0.960–0.983)* |
| Weight (kg) | 64.8 ± 10.7 | 65.5 ± 11.1 | 0.0004 | 0.987 (0.981–0.992)* |
| BMI (kg m−2) | 24.1 ± 3.9 | 24.3 ± 4.1 | 0.005 | 0.982 (0.972–0.988)* |
| Men (n = 61) | ||||
| Height (cm) | 178.1 ± 6.4 | 177.6 ± 6.3 | 0.0002 | 0.985 (0.975–0.981)* |
| Weight (kg) | 80.4 ± 12.6 | 81.2 ± 13.0 | <0.0001 | 0.993 (0.988–0.995)* |
| BMI (kg m−2) | 25.3 ± 3.5 | 25.7 ± 3.6 | <0.0001 | 0.983 (0.973–0.990)* |
| By age group | ||||
| <45 years (n = 71) | ||||
| Height (cm) | 171.2 ± 8.9 | 171.2 ± 8.4 | 0.136 | 0.990 (0.985–0.994)* |
| Weight (kg) | 70.0 ± 13.6 | 70.5 ± 13.8 | 0.009 | 0.992 (0.988–0.996)* |
| BMI (kg m−2) | 23.7 ± 3.6 | 23.9 ± 3.7 | 0.005 | 0.981 (0.970–0.988)* |
| ≥45 years (n = 69) | ||||
| Height (cm) | 169.3 ± 9.8 | 169.1 ± 9.7 | 0.236 | 0.990 (0.984–0.993)* |
| Weight (kg) | 73.3 ± 14.1 | 74.2 ± 14.5 | <0.0001 | 0.994 (0.990–0.996)* |
| BMI (kg m−2) | 25.4 ± 3.7 | 25.8 ± 3.9 | <0.0001 | 0.983 (0.973–0.989)* |
| By BMI categories | ||||
| Normal weight (n = 80) | ||||
| Height (cm) | 169.6 ± 9.0 | 169.5 ± 8.7 | 0.719 | 0.992 (0.987–0.994)* |
| Weight (kg) | 63.1 ± 8.5 | 63.4 ± 8.4 | 0.053 | 0.984 (0.976–0.990)* |
| BMI (kg m−2) | 21.9 ± 1.7 | 22.0 ± 1.7 | 0.071 | 0.937 (0.903–0.959)* |
| Overweight (n = 43) | ||||
| Height (cm) | 171.1 ± 9.5 | 170.6 ± 10.0 | 0.017 | 0.987 (0.977–0.993)* |
| Weight (kg) | 78.8 ± 9.2 | 79.9 ± 9.3 | <0.0001 | 0.986 (0.975–0.992)* |
| BMI (kg m−2) | 26.8 ± 1.5 | 27.40 ± 1.3 | <0.0001 | 0.839 (0.722–0.909)* |
| Obese (n = 17) | ||||
| Height (cm) | 171.8 ± 9.0 | 171.8 ± 9.0 | 0.984 | 0.991 (0.970–0.997)* |
| Weight (kg) | 93.3 ± 10.4 | 94.8 ± 10.3 | 0.002 | 0.974 (0.934–0.990)* |
| BMI (kg m−2) | 31.5 ± 1.7 | 32.1 ± 1.6 | 0.006 | 0.864 (0.672–0.948)* |
Data represent mean ± SD for self-reported and measured values
* All p values for ICC and Pearson’s correlation were significant at <0.0001
aPaired t test was used for assessing differences between means of both methods
bIntraclass correlation coefficient (ICC)
cPearson’s product correlation coefficient (r) and their corresponding 95 % confident intervals were used to assess the level of reliability between methods