Evaluation of Reach, Effects and Cost Effectiveness of a Fall Preventive Intervention Including a mHealth Application

The number of participants in relation to estimated size of total target population

Reach of recruitment will be assessed in relation to age.

Reach of recruitment will be assessed in relation to gender.

Reach of recruitment will be assessed in relation to living conditions).

Self-administered chair stand test (i.e. number of stands during 30 seconds).

The Borg Scale of Perceived Exertion during the 30 second chair stand test, rated on a scale between 6 (none) to 20 (maximal exertion).

Answering the question: "How do you perceive you balance?" on a 5-level ordinal scale ranging from "very good" to "very bad".

Answering the question: "How do you perceive your leg muscle strength?" on a 5-level ordinal scale ranging from "very good" to "very bad".

Falls Efficacy Scale-International (FES-I). Concerns about falling is rated for 16 activities (e.g. cleaning the house) on a scale from 1 (not at all concerned ) to 4 (very concerned ). Ratings for each of the 16 activities are summed to a total score ranging from 16 (no concern about falling) to maximum 64 (severe concern about falling)

Health related quality of life is assessed by the EuroQol 5 dimension 5 level self-report questionnaire (EQ-5D-5L).

The EQ-5D-5L descriptive system comprises the following 5 dimensions: mobility, self-care, usual activities, pain/discomfort, anxiety/depression, and a Visual Analogue scale (VAS). Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems, and extreme problems. A 1-digit number express the level selected for each dimension. The digits for 5 dimensions can be combined in a 5-digit number describing the respondent's health state. It should be noted that the numerals 1-5 have no arithmetic properties. The VAS records the respondent's self-rated health on a vertical, visual analogue scale (ranging from 0-100) with endpoints labelled "the best health you can imagine" and "the worst health you can imagine".

Answering the question: "Have you watched the videos we sent you by e-mail during the last 3 months?" on a 4-level ordinal scale.

Exercise intervention: Self-report of any positive effects of the exercise intervention besides effects on balance and strength. On a nominal scale including an optional text field.

Exercise intervention: Self-report of any negative effects (adverse events) of the exercise intervention besides effects on balance and strength. On a nominal scale including an optional text field.

Self-reported minutes/week, pre-defined alternatives in 30 minutes blocks up to more than 2 hours.

Adherence to predefined minutes of 3x30 min/week reported continuously through an integrated exercise diary in the Safe step application and by self-report at follow up assessments.

Answering the question: "If you compare with when you started this study a year ago, how would you assess balance today?" on a 5-level ordinal scale on a 5-level ordinal scale ranging from "much better" to "much worse".

Answering the questions: "If you compare with when you started this study a year ago, how would you assess the muscle strength in your legs today?" on a 5-level ordinal scale ranging from "much better" to "much worse".

Drop-outs and with-draws in the study

Participants will be asked if they have started to do any exercises (besides the study intervention) during the intervention period.

Participants will be asked to report if they have had any cost related to the intervention during the intervention period e.g. for internet access or equipment.

Cost per falls averted, cost per quality adjusted life years gained.

Number of participants participating in technical support sessions

Number of participants participating in try-out group exercise sessions

Falls will be registered every month through a short digital survey, received by email, asking the participant if they had any falls during the last month. If answering yes a few additional questions about when the fall occurred, any resulting injuries and hospital visits will be asked.

Falls will be registered every month through a short digital survey, received by email, asking the participant if they had any falls during the last month. If answering yes a few additional questions about when the fall occurred, any resulting injuries and hospital visits will be asked.