Table 1.
Comparing self-rated and desired body images vs. actual weight status among 6–17 year-old children in the China Health and Nutrition Survey (CHNS) 2011 (n=1,536)
| Actual weight status based on BMI calculated using measured weight and height1 | ||||||
|---|---|---|---|---|---|---|
| 1. Boy (n=787) | 2. Girl (n=749) | |||||
| Underweight (n=136) |
Normal weight (n=494) |
Overweight (n=157) |
Underweight (n=169) |
Normal weight (n=478) |
Overweight (n=102) |
|
| 1) Self-rated body image (n, column %)2 | ||||||
| Thin | 98 (72.1) | 293 (59.3) | 48 (30.6) | 128 (75.7) | 271 (56.7) | 35 (34.3) |
| Average | 37 (27.2) | 197 (39.9) | 87 (55.4) | 39 (23.1) | 204 (42.7) | 62 (60.8) |
| Fat | 1 (0.7) | 4 (0.8) | 22 (14.0) | 2 (1.2) | 3 (0.6) | 5 (4.9) |
| p | <0.001 | <0.001 | ||||
| Total % of agreement | 40.3 | 45.0 | ||||
| Weighted Kappa | 0.13*** | 0.13*** | ||||
| 2) Desired body image (n, column %)3 | ||||||
| Thin | 56 (41.2) | 205 (41.5) | 61 (38.9) | 89 (52.7) | 263 (55.0) | 41 (40.2) |
| Average | 80 (58.8) | 286 (57.9) | 96 (61.1) | 80 (47.3) | 215 (45.0) | 61 (59.8) |
| Fat | 0 (0) | 3 (0.6) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| p | 0.91 | 0.02 | ||||
| Total % of agreement | 43.5 | 40.6 | ||||
| Weighted Kappa | −0.001*** | 0.001 | ||||
X2 test and Fisher’s exact test were used to examine agreement between body images and actual weight status.
***
p<0.001.
1
Child height and weight were measured by trained and certified staffs during detailed physical examination and classified by the Extended International (IOTF) BMI cut-offs (Cole, TJ. et al., 2000).
2–3
Children’s self-ratings using nine silhouettes for 1) that was most like them and 2) the one they would most like to look like were grouped into three levels: thin (silhouettes 1–3), average (silhouettes 4–6), and fat (silhouettes 7–9).