2.8.2. Primary Outcomes
ADVERSE EVENTS, ADVERSE EVENT
The main feasibility-related study parameters were adherence, patient-reported acceptance and usability of the AAT.Adherence was defined as (1) the dropout rate during the study period; (2) the rate of insufficient AAT data collection (activity data available less than 8 h a day for at least four days per week). The trained physiotherapist asked and reported participants’ reasons for dropping out during the baseline, intervention and control conditions.Acceptance of the AAT was measured using the technology acceptance model questionnaire (TAM). The TAM questionnaire evaluates perceived usefulness, ease of use, and technology acceptance [In addition, adverse events reported spontaneously by the participant or observed by the physiotherapist were documented. Adverse events were defined as any undesirable experience occurring to a participant during the study, whether or not it was considered related to the AAT.The usability of the AAT was measured using the system usability scale (SUS). The SUS is a ten-item questionnaire that evaluates perceived usability on a five-point Likert scale, where five indicates ‘strongly agree’ [