The SPINDLE study will examine sleep in infants with atopic dermatitis by serial assessment over the first year of life, in comparison to infants without atopic dermatitis. Sleep will be assessed using electroencephalography, actigraphy, and sleep questionnaires.

Infants will be recruited at 6 to 8 months and followed up until 18 months of age. Sleep electroencephalography will be performed at 6 to 8 months. Sleep actigraphy will be performed at 6 to 8 months and 12 months. Infant sleep questionnaires will be completed on a monthly basis, and parental sleep questionnaires will be completed at 6 to 8 months, 9 to 10 months, and 12 months. A neurodevelopmental assessment will be performed at 18 months.

Inclusion Criteria:

- Moderate to severe atopic dermatitis

Exclusion Criteria:

• Premature birth (under 37 weeks gestation)
• Severe medical condition (such as epidermolysis bullosa or ichthyosis) at time of enrolment that would complicate assessment for AD or preclude the use of investigational tools, or other major health problems (especially genetic or metabolic) that would have implications for neurodevelopment
• Any medical condition requiring the using of sedating medications (eg antihistamines)

Infants under six months of age diagnosed with moderate to severe AD are eligible for the study. Healthy control infants, matched in age, will be recruited for the study.