Table 1.
Results from analysis of variance and chi-square tests comparing girls and boys on pubertal development and eating disorder-related variables
| Girls Mean (sd) | Boys Mean (sd) | Test-statistic F (p-value) | |
|---|---|---|---|
| Pubertal Development at Age 13–14 | 13.6 (3.0) | 10.2 (2.7) | 666.00 (p < .001) |
| Range | 5.0 – 20.0 | 5.0 – 18.0 | |
| EDRC at Age 16–17 | 9.1 (10.0) | 3.6 (5.0) | 250.55 (p < .001) |
| Range | 0 – 58 | 0 – 37 |
| % (n) | % (n) | χ2 (p-value) | |
|---|---|---|---|
| Dieting at Age 16–17 | 21.9 (236) | 4.2 (41) | 137.22 (p < .001) |
| Purging at Age 16–17 | 8.0 (87) | 0.3 (3) | 73.23 (p < .001) |
| Dieting at Age 19–20 | 36.0 (309) | 7.4 (43) | 152.51 (p < .001) |
| Purging at Age 19–20 | 12.4 (107) | 0.7 (4) | 67.10 (p < .001) |
Note. sd = standard deviation. EDRC = Eating Disorder Risk Composite. % = percentage of participants endorsing dieting or purging.
n = number of participants endorsing dieting or purging.