The Balance Scale: reliability assessment with elderly residents and patients with an acute stroke

TLDR

The study aimed to evaluate the reliability of the Balance Scale in elderly residents and acute stroke patients. Researchers assessed internal consistency across multiple time points and examined inter‑ and intra‑rater reliability by having therapists and caregivers administer the scale within short intervals, with repeated assessments by the same rater. Cronbach’s alphas exceeded 0.83 for residents and 0.97 for stroke patients, and ICCs were 0.98 for inter‑rater and 0.97 for intra‑rater agreement, confirming the scale’s strong reliability.

Abstract

The objective of this study was to assess the reliability of the Balance Scale. Subjects were chosen from a larger group of 113 elderly residents and 70 stroke patients participating in a psychometric study. Elderly residents were examined at baseline, and at 3, 6 and 9 months, and the stroke patients were evaluated at 2, 4, 6 and 12 weeks post onset. The Cronbach's alphas at each evaluation were greater than 0.83 and 0.97 for the elderly residents and stroke patients respectively, showing strong internal consistency. To assess inter-rater reliability, therapists treating 35 stroke patients were asked to administer the Balance Scale within 24 hours of the independent evaluator. Similarly, caregivers at the Residence were asked to test the elderly residents within one week of the independent evaluator. To assess intra-rater reliability, 18 residents and 6 stroke patients were assessed one week apart by the same rater. The agreement between raters was excellent (ICC = 0.98) as was the consistency within the same rater at two points in time (ICC = 0.97). The results support the use of the Balance Scale in these groups.