| Name of the Instrument/Tool | Instrumented BASFI (iBASFI) |
| First Description |
Swinnen TW, Milosevic M, Van Huffel S, Dankaerts W, Westhovens R, de Vlam K. Instrumented BASFI (iBASFI) Shows Promising Reliability and Validity in the Assessment of Activity Limitations in Axial Spondyloarthritis |
| Year | 2016 |
| Domains | |
| Concept of constructs | Physical function |
| Population/Disease | Disease specific |
| Originally developed for | Ankylosing spondylitis (AS) |
| Other rheumatic diseases where can be applied (only if validated) |
--- |
| Additional population with no rheumatic diseases |
No |
| Language: Originally published in | English |
| Available in Language | English |
| REFERENCE IDENTIFICATION | |
| Author/s | Swinnen TW, Milosevic M, Van Huffel S, Dankaerts W, Westhovens R, de Vlam K. |
| Title | Instrumented BASFI (iBASFI) Shows Promising Reliability and Validity in the Assessment of Activity Limitations in Axial Spondyloarthritis |
| Journal | J Rheumatol. |
| Year | 2016 |
| Vol | 43 |
| Num | 8 |
| Pages | 1532-1540 |
| Country | The Netherlands |
| Language | English |
| Other references of interest | |
| Link | https://pubmed.ncbi.nlm.nih.gov/14671991/ |
| Brief Description |
Study that provides evidence that performance-based tests may be less prone to personal and environmental influences. |
| Link | http://www.ncbi.nlm.nih.gov/pubmed/7699629 |
| Brief Description |
A new approach to defining functional ability in ankylosing spondylitis: the development of the Bath Ankylosing Spondylitis Functional Index (original English version). |
| Link | http://www.ncbi.nlm.nih.gov/pubmed/20306214 |
| Brief Description |
Reproducibility of the Bath Ankylosing Spondylitis Indices of disease activity (BASDAI), functional status (BASFI) and overall well-being (BAS-G) in anti-tumour necrosis factor-treated spondyloarthropathy patients. |
| Instrument/Tool Translations References | |
| No other References. | |
| DEVELOPER CONTACT INFORMATION | |
| Correspondence to | Dr. K. de Vlam |
| kurt.devlam@uzleuven.be | |
| Address | Herestraat 49, Box 7003/13, 3000 Leuven, Belgium. |
| Website | --- |
| Available | --- |
| Links |
The BASFI questionnaire using VAS is available in the original publication. Available online (in multiple translations) at http://www.asas-group.org and at http://www.asif.rheumanet.org/. |
| DESCRIPTION OF THE INSTRUMENT | |
| Type Of Measure | Composite Index |
| Brief Description |
The instrumented BASFI (iBASFI) uses the BASFI, a patient self-administered questionnaire used to measure patient-reported physical function in patients with AS/axial SpA, and adds a body-worn accelerometer with automated algorithms to performance-based measurements (PBM). |
| Number of Items | 10 |
| Range | 0-10 |
| Responses options/scale |
Yes (0–10 cm) anchored by adjectival descriptors “easy” and “impossible.” |
| Developed for | --- |
| PRACTICAL APPLICATION | |
| Method of administration | Interviewer/assessor |
| Recommendations to score |
For the questionnaire: The mean of the individual scores is calculated to give the overall index score. |
| Score Interpretation | For the questionnaire: Score range is 0–10, with 0 reflecting no functional impairments and 10 reflecting maximal impairment. |
| Cut-off points | --- |
| Cut-off points applied to | --- |
| Smallest detectable change if described | --- |
| Smallest detectable change applied to | --- |
| Completion time by the patient | and cervical rotation) take < 5 minutes |
| Scoring time by the assessor | 0 minutes |
| Training to score | Not necessary |
| Strengths | Useful in clinical practice & research |
| Limitations | Complex scoring |
| OTHER COMMENTS | |
| Other Comments | --- |