====== Double Setup ======

===== Study aims =====


The Double setup study aimed to validate the use of the Self applied somnography (SAS) system for use as a type-2 polysomnography system. Where the biggest difference between the gold standard PSG and the SAS being that the self applied system has a 4 channel frontal EEG and does not include the chin EMG. It further aimed to compare and validate the data from the wearables Empatica E4 and withings watches to the type 2 polysomnography measures.

{{:cluster:datasets:sas.png?400|SAS}}   {{:cluster:datasets:frontaleeg.png?400|Frontal EEG}}

===== Study Protocol =====

Participants slept in their home invironment for one night with the following signals being recorded:

  * SAS - includes frontal-EEG, respiratory signals(cannula, thorax and abdominal breathing belts and oximeter), EGC and EMG.
  * Gold standard EEG - 6 channel EEG with reference electrodes behind ears and 2 EOG channels.
  * Sweating in palm - Electrodermal activity(EDA) electrodes placed in participants palm. 
  * Empatica E4 watch 
  * Withings smartwatch

| **Details** |       |
| Number of participants | 201 |

===== Summary of the collected data: =====

|**Sleep studies:**| Sleep stages, breathing, snoring (audio), oxygen desaturation, electrocardiogram, leg movements, body movements, sleep position.|
|**Anthropometry, body composition, physical fitness:**| Height, weight and body mass index (BMI)|
|**Withings smartwatch:**| Heart rate, movement, sleep, oxygen saturation.|
|**Empatica smartwatch:**| EDA, temperature.|
|**Questionnaires:**| ISI, Screening questions for RLS, StopBANG, ESS, Berlin, PSQI, Questions about insomnia and sleepiness. |


===== How to get to know the data? =====


===== How to validate the results data? =====