Table 2 Comparisons of self-reported and directly measured weight among 11- to 15 year old adolescents by weighing history, recall ability for weight and response capability for weight
N | Weight/self-reported (kg) | Weight/direct (kg) | Difference for weight (kg) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | 95% CI | P value* | ||
Boys | 839 | 50.98 | 13.14 | 51.79 | 13.29 | −0.81 | 4.95 | −1.15; -0.81 | <0.0001 |
Girls | 845 | 47.63 | 10.07 | 49.45 | 10.60 | −1.82 | 3.15 | −2.03; -1.61 | <0.0001 |
Weighing history | |||||||||
Boys | |||||||||
Weighed recently | 572 | 50.74 | 13.12 | 51.64 | 13.30 | −0.90 | 4.24 | −1.24; -0.55 | <0.0001 |
Not weighed recently | 259 | 51.51 | 13.28 | 52.17 | 13.37 | −0.67 | 6.27 | −1.43; -0.10 | 0.0893 |
Girls | |||||||||
Weighed recently | 645 | 47.69 | 10.09 | 49.26 | 10.41 | −1.57 | 2.64 | −1.77; -1.36 | <0.0001 |
Not weighed recently | 195 | 47.29 | 10.01 | 49.99 | 11.22 | −2.70 | 4.11 | −3.28; -2.12 | <0.0001 |
Recall ability for weight | |||||||||
Boys | |||||||||
High recall ability | 718 | 50.64 | 13.33 | 51.40 | 13.40 | −0.76 | 4.94 | −1.12; -0.40 | <0.0001 |
Low recall ability | 112 | 53.13 | 11.95 | 54.34 | 12.58 | −1.21 | 5.09 | −2.17; -0.26 | 0.0131 |
Girls | |||||||||
High recall ability | 726 | 47.54 | 10.00 | 49.14 | 10.38 | −1.61 | 2.83 | −1.81; -1.40 | <0.0001 |
Low recall ability | 109 | 48.26 | 10.65 | 51.31 | 11.84 | −3.06 | 4.45 | −3.91; -2.21 | <0.0001 |
Response capability for weight | |||||||||
Boys | |||||||||
Weighed recently + high recall ability | 538 | 50.61 | 13.15 | 51.49 | 13.36 | −0.88 | 4.25 | −1.24; -0.52 | <0.0001 |
Weighed recently + low recall ability | 32 | 53.07 | 12.83 | 54.10 | 12.57 | −1.03 | 4.21 | −2.55; 0.49 | 0.1757 |
Not weighed recently + high recall ability | 179 | 50.78 | 13.91 | 51.16 | 13.59 | −0.39 | 6.62 | −1.36; 0.59 | 0.4343 |
Not weighed recently + low recall ability | 80 | 53.15 | 11.66 | 54.44 | 12.66 | −1.29 | 5.43 | −2.50; -0.08 | 0.0373 |
Girls | |||||||||
Weighed recently + high recall ability | 599 | 47.79 | 9.99 | 49.21 | 10.20 | −1.42 | 2.39 | −1.61; -1.23 | <0.0001 |
Weighed recently + low recall ability | 42 | 46.80 | 11.62 | 50.35 | 13.37 | −3.56 | 4.44 | −4.94; -2.17 | <0.0001 |
Not weighed recently + high recall ability | 126 | 46.20 | 9.93 | 48.84 | 11.30 | −2.64 | 3.94 | −3.33 ¸-1.94 | <0.0001 |
Not weighed recently + low recall ability | 67 | 49.17 | 9.98 | 51.92 | 10.83 | −2.75 | 4.46 | −3.84 ¸-1.66 | <0.0001 |