This study aims to evaluate the viability of wearable and portable technologies for sleep staging in children and adolescents. The results will be compared with polysomnography, in order to achieve clinical and diagnostic validation. Three domains of devices will be used: movement sensors, wearable EEG band and pulse oximetry.

The project will include individuals between the ages of 3 and 18 who reside in São Paulo city and undergo a polysomnography test at the Sleep Laboratory of the Children's Institute of the Hospital das Clínicas of the University of São Paulo.

This study aims to evaluate the viability of the combined use of wearable and portable technologies for sleep staging. The results will be compared with polysomnography, in order to achieve clinical and diagnostic validation. Three domains of devices will be used:

• Movement sensors: Devices equipped with movement sensors (such as an accelerometer) able to monitor movement over the using period, converting this information in data related to the sleep-wakefulness cycle. In this category, the reference devices are the actimeters/actigraphs (ACT). Its use is recommended by the American Academy of Sleep Medicine to the diagnosis of insomnia and circadian sleep disorders, and should be used for 3 to 14 consecutive days. Other wearable devices, such as smartwatches, are also used with the same purpose, although not validated for clinical use.
• Wearable EEG band: EEG is a mandatory feature for type-1 polysomnography and a requirement for regular sleep staging. The project will utilize a wearable EEG band in combination with actigraphy and a ring oximeter to improve the estimation of sleep stages. This study will test wearable EEG bands with the following minimal specifications: dry EEG electrodes (no need for paste, gel, or other conductors), presented as a headband or stripe, a minimal sampling rate of 500Hz, noise, high and low filters, a battery lasting at least 8 hours, a maximum weight of 200g (including the whole device), and support for Bluetooth connection.
• Ring oximeter: The project will utilize a ring oximter to record the overnight blood oxygen levels, heart rates, and body movements.

Inclusion Criteria:

• All genders
• 3 to 18 years olnde
• Resident in the city of São Paulo
• Candidate to perfome a polysomnography test at the Sleep Laboratory of the Children's Institute of the Hospital das Clínicas of the University of São Paulo.

Exclusion Criteria:

• None.

Children/adolescents who come to the Sleep Laboratory of the Children's Institute of the University of São Paulo for a polysomnography test.

The dissemination of Individual Participant Data (IPD) from this study is strictly limited by restrictions on the release of intellectual property, concerns regarding participant privacy and confidentiality, and the absence of explicit consent for extensive data sharing. However, upon reasonable request and subject to approval by the study's principal investigator, anonymized datasets may be provided to qualified researchers. It is imperative that requests include a thorough research proposal and a rationale that substantiates the need for the resources in question.