Hospital Environmental Exposure

There is an increasing body of evidence that human health is affected by environmental factors such as air quality, noise and light. This applies to both indoor and outdoor environments. While there have been several studies looking at homes, offices and work environments, hospital environments are still poorly characterised. Indoor hospital environments are complex, and patients with various health conditions can spend extended periods of time in wards. A number of studies have reported an association of air pollution exposure and a disturbance to sleep. A lack of sleep, or poor and disrupted sleep can impact health. Disturbed sleep therefore can impact a patient's recovery in hospital wards. In addition to the exposure to air pollutants, noise and light levels within the hospital environment can also have an impact on patient health. Inadequate, or a disrupted light and dark cycles can impact the circadian rhythm of the human body, responsible for the sleep cycle. In this study, the investigators aim to characterise these exposures and address the impact of these exposures on the patient sleep. Given the links between sleep and the environmental conditions.

Inclusion Criteria: * Hospital admission with a diagnosis that requires at least 2 nights. * Participant is willing and able to give informed consent for participation in the study. If a patient for example has dementia and/ or the inability to retain information or if they are unable to wear the device, they will not be consented. * Aged 18 years or above. * Able (in the ward staff, research team and investigator's opinion) and willing to comply with all study requirements. Exclusion Criteria: * Any significant disease or disorder which, in the opinion of the investigator, may either put the participants or other patients at risk because of participation in the study, or may influence the result of the study, or the participant's ability to participate in the study. * Reported history of sleep disorders, including obstructive sleep apnoea syndrome (OSAS) or insomnia.