A pilot investigation of reliability and validity of balance and gait assessments using telehealth with healthy older adults

Background: The use of telehealth has increased since the COVID-19 pandemic; however, the lack of reliable and valid tools to measure balance and gait remotely makes assessing these outcomes difficult. Thus, we investigated whether balance and gait measures used in clinical practice are reliable and valid when assessed remotely through telehealth.

Method: In this pilot study, we investigated 15 healthy older adults who performed validated tests: Timed Up and Go simple, dual cognitive and motor tasks; Berg Balance Scale; Functional Gait Assessment and Dynamic Gait Index. The tests were assessed on two dates: (i) face-to-face, (ii) and remotely, via videoconference between 7 and 14 days after the initial assessment. Participants also undertook the Physiological Profile Assessment (PPA) to assess their risk of falling. Reliability was measured using intraclass correlation (ICC) two-way mixed with absolute agreement to contrast the score of the assessments undertaken face-to-face and remotely in real-time and recorded. We also assessed inter-rater reliability. Criterion validity was measured using Pearson correlation between the tests that were undertaken remotely and PPA.

Results: All tests showed good reliability between face-to-face and real-time telehealth (ICC = 0.79-0.87) and face-to-face and recorded telehealth (ICC = 0.78-0.88) assessments and good to excellent inter-rater reliability (ICC = 0.80-1.00). Correlation between the tests and PPA were significantly (p < 0.05) moderate for real-time (r = -0.68-0.64) and recorded (r = -0.69-0.71) telehealth assessments.

Conclusions: The good reliability between face-to-face and remote measurements together with moderate validity of these measures to assess fall risk suggest that health professionals could use these measures to evaluate the balance and gait of healthy older adults remotely.