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Table 2 Data extraction variables

From: Exercise interventions for older adults with Alzheimer’s disease: a systematic review and meta-analysis protocol

Variable Additional details
Study inclusion/exclusion If excluded, rationale provided
Design and setting  
Dates Study duration
N, number of groups, and dropout rates  
Participant demographics This will include baseline cognitive status and activity or fitness level, diagnosis, disease severity, co-morbidities, Apo-E status, age, sex, nationality and/or ethnicity, socioeconomic status, and education
Included caregiver or caretaker  
Recruitment approach  
Adherence reported according to how intervention was recorded For example, supervised, unsupervised, objective monitors, etc.
Follow-up assessment  
Outcomes To include cognitive, emotional, functional, motor, physiological, social, or quality of life
Reported challenges and conflicts  
Bias assessment variables To include randomization method, randomization concealment, blinding, method of reporting outcomes, missing information, and other relevant variables
Outcome description To include scale range; minimal detectable change; and/or minimal clinically important difference; incidence of dementia; time to conversion; changes in health, cognitive, or quality of life variables; and changes in dementia related biomarkers
Other outcome factors To include time to follow-up in study methodology, scale range, minimal detectable change, and/or minimal clinically important difference
Results: included participant group sizes, summary of results For example, means, SD, and statistical changes
Physical activity/exercise treatment prescription data
 Physical activity/exercise modality For example, type, group, peer/coach, and additional motivators
 Treatment minutes/session  
 Treatment duration Total number of weeks
 Supervised or unsupervised treatment paradigm  
 Harm or side effects Drug or secondary health condition interaction