Monitoring Physical Activity in Acutely Hospitalized Elderly of 70 Years and Older

Defined as the total number of minutes standing and walking divided by the total number of valid measurement days in the period between inclusion and (intended) discharge. In order to create a prediction model, this will be dichotomized into a low and high amount of time spent physically active per day during hospitalization. As the estimated event rate of a high amount of time spent physically active per day during hospitalization is 50%, the cut-off value between a low and high amount of time spent physically active will be defined by dividing the cohort at the median.

Defined as the total number of BST divided by the total number of valid measurement days in the period between inclusion and (intended) discharge. A BST is defined as any transition from being sedentary (lying or sitting) to being physically active (standing or walking).

In order to create a prediction model, this will be dichotomized into a low and high number of breaks in sedentary time per day during hospitalization. As the estimated event rate of a high number of breaks in sedentary time per day during hospitalization is 50%, the cut-off value between a low and high number of breaks in sedentary time will be defined by dividing the cohort at the median.

Summary score on the scale: 0-12 points. Higher scores indicates better functioning. SPPB evaluates balance, gait, strength and endurance by examining an individual's ability to stand with feet together in side-by-side, semi-tandem and tandem positions, time to walk 4 meter and time to rise from a chair and return to the seated position five times. Component scores (0-4) for the three categories are measured as well.

The AM-PAC and provides a transparent measure of patients' capabilities in functional mobility during hospitalization. It measures the following daily activities: turning in bed, sitting down and standing up, moving from lying to sitting position, moving from a bed to a chair, walking and climbing stairs (6-24 points).

Categories 70-79, 80-89, ≥90 years

Male / Female

Number of disabilities on the Katz Index of Independence in Activities of Daily Living (Katz ADL). The Katz ADL measures the patient's ability to perform ADL independently. It is a dichotomous rating (dependant / independent) of six ADL functions, bathing, dressing, toileting, transferring, continence and feeding. It rates the level of independence or dependence in these tasks and is categorized by the amount of assistance needed to complete the task. The researcher will ask the patient how much assistance was needed to complete the tasks 2 weeks prior to admission.

Yes/No. If yes, specify type of walking aid used prior to admission. The use of ambulation assistive device prior to admission is asked by the researcher.

Clinical diagnosis as reported in the electronic medical record by the physician. The last reported clinical diagnoses by the physician before intended discharge will be extracted.

Did the patient receive one or more sessions of physiotherapy between inclusion and intended discharge? (Yes / No). All sessions will be reported by the physical therapist in the electronic medical record.

The number of falls in the last 6 months before hospital admission. Measured retrospectively by asking the patient the following question: Have you fallen once or more in the past six months? If yes, how many times? Question is asked by the researcher.

Charlson Comorbidity Index (CCI). Comorbidities are reported by the physician in the electronic medical record. All comorbidities present in the period between admission and intended discharge are extracted by the researcher and used to calculate the Charlson Comorbidity Index.

Number of days from admission to the hospital to intended discharge (Defined as the day the patient is medically ready for discharge and is either discharged or staying for non-medical reasons.). Length of stay is retrieved from the electronic medical record.

Home, geriatric rehabilitation center, nursing home, other. As reported in the electronic medical record by the physician.