Number and percentage of students meeting syndrome criteria
| Category | Subcategory | Total sample N=1654 | Percentage of total (in %) | 95% CI incl. continuity correction | Sex ratio (female:male) |
|---|---|---|---|---|---|
| AN | Full syndrome | 5 | 0.3 | 0.1 to 0.7 | 5:0 |
| Atypical-AN | 58 | 3.6 | 2.7 to 4.5 | 45:13*** | |
| Partial syndrome (meeting only cognitive criteria) | 180 (115) | 10.9 (7.1) | 9.4 to 12.5 (5.8 to 8.3) | 135:45*** (91:24***) | |
| Subthreshold syndrome | 13 | 0.8 | 0.4 to 1.4 | 10:3 | |
| Any syndrome (sum) | 256 | 15.5 | 13.8 to 17.3 | 195:61*** | |
| BN | Full syndrome | 6 | 0.4 | 0.2 to 0.8 | 5:1 |
| BN (low frequency/duration) | 0 | 0 | − | − | |
| Partial syndrome (meeting only behavioural criteria) | 4 (1) | 0.2 (0.1) | 0.1-0.6 (0.1 to 0.6) | 2:2 (0:1) | |
| Subthreshold syndrome | 5 | 0.3 | 0.1 to 0.7 | 3:2 | |
| Any syndrome (sum) | 15 | 0.9 | 0.5 to 1.5 | 10:5 | |
| BED | full syndrome | 8 | 0.5 | 0.2 to 0.9 | 5:3 |
| BED (low frequency/duration) | 0 | 0 | − | − | |
| Partial syndrome (meeting only behavioural criteria) | 34 (24) | 2.1 (1.5) | 1.5-2.9 (1.0 to 2.2) | 30:4*** (21:3**) | |
| Subthreshold syndrome | 3 | 0.2 | 0.1 to 0.5 | 3:0 | |
| Any syndrome (sum of above) | 45 | 2.7 | 2.0 to 3.6 | 38:7*** | |
| PD | Purging disorder | 31 | 1.9 | 1.3 to 2.7 | 22:9* |
| Total eating disorder syndromes | 347 | 21.0 | 19.1 to 23.0 | 265:82*** | |
***p <0.001, **p <0.01, *p <0.05.
AN, anorexia nervosa; BED, binge eating disorder; BN, bulimia nervosa; PD, purging disorder.