Table 3. Sex differences within weight misperception methodologies.
| Boys | Girls | χ2 | Nominal Pa |
Actual Pb |
|
|---|---|---|---|---|---|
| Perceived/self-reported, % | |||||
| 2 × 2 table | 16.15 | NA | <0.0001 | ||
| Accurate | 65.5 (n = 408) | 75.9 (n = 466) | |||
| Misperceptionc | 34.5 (n = 215) | 24.1 (n = 148) | |||
| 3 × 2 table | 53.99 | NA | <0.0001 | ||
| Underestimation | 29.9 (n = 186) | 13.8 (n = 85) | 46.34 | <0.0001 | <0.0002 |
| Accurate | 65.5 (n = 408) | 75.9 (n = 466) | 16.15 | <0.0001 | <0.0002 |
| Overestimation | 4.7 (n = 29) | 10.3 (n = 63) | 14.12 | 0.0002 | 0.0004 |
| Perceived/actual, % | |||||
| 2 × 2 table | 19.59 | NA | <0.0001 | ||
| Accurate | 63.4 (n = 472) | 74.1 (n = 539) | |||
| Misperceptionc | 36.6 (n = 272) | 25.9 (n = 188) | |||
| 3 × 2 table | 65.45 | NA | <0.0001 | ||
| Underestimation | 34.7 (n = 258) | 18.6 (n = 135) | 48.73 | <0.0001 | <0.0002 |
| Accurate | 63.4 (n = 472) | 74.1 (n = 539) | 19.59 | <0.0001 | <0.0002 |
| Overestimation | 1.9 (n = 14) | 7.3 (n = 53) | 24.74 | <0.0001 | <0.0002 |
a
P value was obtained from multiple comparisons.
b
For the percentage data of multiple comparisons in categorical data analysis, the correction of adjustment of the significant level was the number of pairwise comparisons minus one.
c
Misperception includes underestimation and overestimation.