| Name of the Instrument/Tool | Bath Ankylosing Spondylitis Functional Index (BASFI) |
| First Description |
Calin A, Garrett S, Whitelock H, Kennedy LG, O'Hea J, Mallorie P, Jenkinson T. A new approach to defining functional ability in ankylosing spondylitis: the development of the Bath Ankylosing Spondylitis Functional Index. J Rheumatol 1994;21(12):2281–5. |
| Year | 1994 |
| 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 | Arabic, Chinese, Croatian, Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Korean, Norwegian, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish, Ukrainian |
| REFERENCE IDENTIFICATION | |
| Author/s | Calin A |
| Title | A new approach to defining functional ability in ankylosing spondylitis: the development of the Bath Ankylosing Spondylitis Functional Index |
| Journal | J Rheumatol |
| Year | 1994 |
| Vol | 21 |
| Num | 12 |
| Pages | 2281–5 |
| Country | United Kingdom |
| Language | English |
| Other references of interest | |
| 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. |
| Link | http://www.ncbi.nlm.nih.gov/pubmed/15630730 |
| Brief Description |
Establishment of the minimum clinically important difference for the bath ankylosing spondylitis indices. |
| Link | http://www.ncbi.nlm.nih.gov/pubmed/12522830 |
| Brief Description |
Evaluation of the smallest detectable difference in outcome or process variables in ankylosing spondylitis. |
| Instrument/Tool Translations References | |
| 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/21971711 |
| Brief Description |
Portuguese version of the Bath indices for ankylosing spondylitis patients: a cross-cultural adaptation and validation. |
| Link | http://www.ncbi.nlm.nih.gov/pubmed/23090373 |
| Brief Description |
Cross-cultural adaptation and validation of the Brazilian-Portuguese version of the Bath Ankylosing Spondylitis Functional Index (BASFI).
|
| DEVELOPER CONTACT INFORMATION | |
| Correspondence to | Dr Andrei Calin |
| calinandrei@hotmail.com | |
| Address | The Coach House, Linden Gardens, Bath, BA1 2YB, UK |
| Website | --- |
| Available | --- |
| Links | --- |
| DESCRIPTION OF THE INSTRUMENT | |
| Type Of Measure | Questionnaire |
| Brief Description |
Patient self-administered questionnaire used to measure patient-reported physical function in patients with AS/axial SpA. The instrument was first published in 1994 using visual analogue scales. The use of numerical rating scales has also been validated. The index includes eight items concerning activities referring to the functional anatomy of the patients (bending, reaching, changing position, standing, turning, and climbing steps), and 2 items assessing the patients’ ability to cope with everyday life. |
| Number of Items | 10 |
| Range | 0-10 |
| Responses options/scale |
Yes 0–10 cm) anchored by adjectival descriptors “easy” and “impossible.” |
| Developed for | Both |
| PRACTICAL APPLICATION | |
| Method of administration | Self-administered |
| Recommendations to score |
The mean of the individual scores is calculated to give the overall index score. |
| Score Interpretation | 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 | less than 3 minutes. minutes |
| Scoring time by the assessor | 0 minutes |
| Training to score | Not necessary |
| Strengths | Useful in clinical practice & research, Widely used |
| Limitations | Floor effect |
| OTHER COMMENTS | |
| Other Comments | --- |