Schedule of observations
| Outcomes collected | Baseline | 24 weeks (primary outcome) | 52 weeks (end of study) |
| Baseline characteristics | |||
| Demographics | ✓ | ||
| Prior belief about effectiveness | ✓ | ||
| Previous online resource use | ✓ | ||
| Clinical effectiveness outcomes | |||
| POEM (4-weekly) | ✓ | ✓ | ✓ |
| Long-term control (Recap) | ✓ | ✓ | ✓ |
| Itch intensity measure (ECO-YP only) | ✓ | ✓ | ✓ |
| Patient Enablement Instrument (PEI) | ✓ | ✓ | ✓ |
| Cost-effectiveness outcomes | |||
| CHU-9D (ECO-PC for parents/carers of children aged 2–12 only) | ✓ | ✓ | ✓ |
| EQ-5D-5L (ECO-YP only) | ✓ | ✓ | ✓ |
| Medical notes review for medication use, service use and referrals | ✓ (including 3 months pre-baseline period) | ||
| Process outcomes | |||
| Problematic Experiences of Therapy Scale (PETS) | ✓ | ✓ | ✓ |
| Frequency of eczema treatment use (adherence) | ✓ | ✓ | ✓ |
| Intervention usage | ✓ (recorded throughout study) | ||
POEM, Patient-Oriented Eczema Measure.