Development of a Functional Bridge Test for Screening Impairments and Disabilities in Hemiplegic Patients with Acute Stroke while on the Bed

Objectives: To provide a safe and appropriate out-of-bed program for stroke patients, screening for stroke-related functional impairments and disabilities should be performed in advance. However, few tools are available for clinical assessment of out-of-bed mobility while patients are still on bed. We sought to establish the validity and reliability of a newly developed Functional Bridge Test (FBT) for hemiplegic patients with acute stroke. Methods: This repeated-measures, observational study was conducted at a stroke care unit at an acute hospital. We assessed the validity of the FBT score, intra-rater and inter-rater reliabilities of the FBT, and concurrent validity of the FBT in stroke patients with hemiplegia. In addition to the original qualitative assessment, the FBT was also assessed quantitatively to evaluate the validity of the FBT score. Outcome measures included stroke severity, lower limb muscle strength, and basic mobility. Results: We enrolled 32 patients with acute stroke. The newly developed FBT score had high validity. Intra-rater and inter-rater reliabilities (weighted kappa coefficient, 95% confidence interval) showed almost perfect agreement (0.95, 0.88-1.00; 0.98, 0.94-1.00, respectively). The FBT score was significantly associated with stroke severity, physical function, and basic mobility. Conclusions: The FBT has sufficient validity and reliability for acute stroke patients with hemiplegia. The advantages of the FBT in a clinical setting are based on its ability to be quickly administered on a bed without the need for specialized equipment. The FBT may help in screening functional impairment and disability in hemiplegic patients with acute stroke before they resume out-of-bed activities.