| Differential diagnoses | Frequency |
|---|---|
| Depression | 25 (32%) |
| Selective mutism | 15 (19%) |
| Eating disorder (anorexia nervosa) | 12 (15%) |
| Chronic fatigue syndrome | 11 (14%) |
| Catatonia | 11 (14%) |
| Conversion disorder | 8 (10%) |
| Anxiety | 7 (9%) |
| Somatoform disorder | 5 (6%) |
| PTSD | 5 (6%) |
| Psychosis | 3 (4%) |
| Autism spectrum disorder | 3 (4%) |
| School refusal | 3 (4%) |
| Dissociation | 3 (4%) |
| Guillain–Barré syndrome | 3 (4%) |
| Abnormal grief | 2 (3%) |
| Malingering | 2 (3%) |
| Factitious disorder | 1 (1%) |
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