Sleep efficiency (SE, %) based on actigraphy during the study.

Wake after sleep onset (WASO) based on actigraphy during the study.

Awake time based on actigraphy during the study.

Time in bed(TIB) based on actigraphy during the study.

The Conners Continuous Performance Test is a computer administered test that is designed to assess problems with attention,impulsivity and vigilance .Many statistics are computed including omission errors , commission errors, hit reaction time, hit reaction time standard error, detectability, response style, perseverations , hit reaction time by block, standard error by block, reaction time by ISI , and standard error by ISI. These statistics are converted to T-scores and can be interpreted in terms of various aspects of attention including inattention, impulsivity, and vigilance.Higher rates of correct detections indicate better attentional capacity.

Epworth Sleepoiness Scale (ESS) assesses the responder's propensity to doze or fall asleep during 8 common daily activities, such as: sitting and reading; sitting inactive in a public place; sitting and talking to someone; sitting quietly after a lunch without alcohol; or in a car, while stopped for a few minutes in traffic.

Score of 0 to 10 indicate normal range of sleepiness in healthy adults.;11 to 14 indicate mild sleepiness;15 to 17 indicate moderate sleepiness;18 to 24 indicate severe sleepiness .

36-Item Short-Form Health Survey (SF-36) includes 11 major questions that evaluate eight components (0-100), with higher scores indicating better outcome.These components include physical functioning, role limitations due to physical health, role limitations due to emotional problems, energy/fatigue, emotional wellbeing, social functioning, pain, and general health.

The Geriatric Depression Scale-15 is a screening tool used to identify symptoms of depression in elderly adults.Scores of 0-4 are considered normal; 5-8 indicate mild depression; 9-11 indicate moderate depression; and 12-15 indicate severe depression.It takes about 5 to 7 minutes to complete.

The Montreal Cognitive Assessment is a test used by healthcare providers to evaluate people with memory loss or other symptoms of cognitive decline. It can help identify those at risk for developing Alzheimer's disease and other forms of dementia. It is also used as a screening tool for conditions like Parkinson's disease, brain tumors, substance abuse, and head trauma.

The MoCA checks different types of cognitive or thinking abilities. These include:orientation,short-term memory/delayed recall,executive function/visuospatial ability,language,abstraction,naming,attention.

Scores on the MoCA range from zero to 30. A score of 26 and higher is considered normal.1 point is added to the test-taker's score if they have 12 years or less of formal education.

The MoCA contains 30 questions and takes around 10 to 12 minutes to complete.

The Hospital Anxiety and Depression Scale aims to measure symptoms of anxiety and depression.As in the HADS, the response to each item is rated 0-3. Higher scores indicate higher levels of anxiety or depression.

The Pittsburgh Sleep Quality Index (PSQI) is a self-rated questionnaire for assessing the subjective sleep quality, which consists of 19 items and can be calculated and combined into 7 clinically-derived component score (0-3), with higher scores indicating worse sleep quality.

The Barthel Index (BI) measures the extent to which somebody can function independently and has mobility in their activities of daily living (ADL) i.e. feeding, bathing, grooming, dressing, bowel control, bladder control, toileting, chair transfer, ambulation and stair climbing.Scores of 0-20 indicate "total" dependency, 21-60 indicate "severe" dependency, 61-90 indicate "moderate" dependency, and 91-100 indicates "slight" dependency.

The Instrumental Activities of Daily Living (IADL) Scale is used to assess independent living skills of an individual and measures functional ability as well as declines and improvements over time. The test measures eight realms of function through self report, which attempt to assess everyday functional competence in the elderly. This is done by evaluating a more complex set of behaviours like telephoning, shopping, food preparation, housekeeping, laundering, use of transportation, use of medicine, and financial behaviour. Each domain measured by the scale relies on either cognitive or physical function, though all require some degree of both.

The Lawton IADL scale can be scored in several ways, the most common method is to rate each item either dichotomously (0 = less able, 1 = more able) or trichotomously (1 = unable, 2 = needs assistance, 3 = independent) and sum the eight responses. The higher the score, the greater the person's abilities.

The Insomnia Severity Index is a 7-item self-report questionnaire assessing the nature, severity, and impact of insomnia.The usual recall period is the "last month" and the dimensions evaluated are: severity of sleep onset, sleep maintenance, and early morning awakening problems, sleep dissatisfaction, interference of sleep difficulties with daytime functioning, noticeability of sleep problems by others, and distress caused by the sleep difficulties. A 5-point Likert scale is used to rate each item (e.g., 0 = no problem; 4 = very severe problem), yielding a total score ranging from 0 to 28. The total score is interpreted as follows: absence of insomnia (0-7); sub-threshold insomnia (8-14); moderate insomnia (15-21); and severe insomnia (22-28).

The clinical frailty scale is a 9-point scale that quantifies frailty based on function in individual patients. It is complemented by a visual chart to assist with the classification of frailty. Higher scores indicate increased frailty and associated risks.