| Name of the Instrument/Tool | Functional Index-3 (FI-3) |
| First Description |
Ernste FC, Chong C, Crowson CS, Kermani TA, Mhuircheartaigh ON, Alexanderson H. Functional Index-3: A Valid and Reliable Functional Outcome Assessment Measure in Patients With Dermatomyositis and Polymyositis. J Rheumatol. 2021 Jan 1;48(1):94-100. |
| Year | 2021 |
| Domains | |
| Concept of constructs | Health related quality of life, Functional status |
| Population/Disease | Disease specific |
| Originally developed for | Idiopathic Inflammatory Myopathies (IIM) |
| 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 | --- |
| REFERENCE IDENTIFICATION | |
| Author/s | Ernste FC, Chong C, Crowson CS, Kermani TA, Mhuircheartaigh ON, Alexanderson H. |
| Title | Functional Index-3: A Valid and Reliable Functional Outcome Assessment Measure in Patients With Dermatomyositis and Polymyositis. |
| Journal | J Rheumatol |
| Year | 2021 |
| Vol | 48 |
| Num | 1 |
| Pages | 94-100 |
| Country | USA |
| Language | English |
| Other references of interest | |
| Link | https://pubmed.ncbi.nlm.nih.gov/16463422/ |
| Brief Description |
Functional index-2: Validity and reliability of a disease-specific measure of impairment in patients with polymyositis and dermatomyositis |
| Instrument/Tool Translations References | |
| No other References. | |
| DEVELOPER CONTACT INFORMATION | |
| Correspondence to | Ernste Floranne |
| ernste.floranne@mayo.edu | |
| Address | Division of Rheumatology, Department of Medicine, Mayo Clinic in Rochester, MN. |
| Website | --- |
| Available | --- |
| Links | --- |
| DESCRIPTION OF THE INSTRUMENT | |
| Type Of Measure | Performance-based instrument |
| Brief Description |
The FI-3 is a clinical assessment tool to measure muscle endurance in patients with dermomyositis and polymyositis. It is based on FI-2. The goal of revising the FI-2 to the FI-3 was to shorten the administration time of a functional assessment tool and to derive a total score (summation of the individual tasks divided by 3) of the instrument to make it more useful to clinicians to follow patient progress. It involves 3 tasks: shoulder flexion, neck flexion, and hip flexion. |
| Number of Items | 3 |
| Range | 0-60 |
| Responses options/scale |
No |
| Developed for | --- |
| PRACTICAL APPLICATION | |
| Method of administration | Physician |
| Recommendations to score |
Scoring was based on the number of correctly performed repetitions with a score varying from 0-60. The total score of the FI-3 was calculated on one side as right shoulder flexion, right hip flexion and neck flexion and divided by 3. Numbers of correct performed repetitions following five learning repetitions are registered for each task |
| Score Interpretation | A score of 60 in a task reflects normal muscle endurance. |
| Cut-off points | --- |
| Cut-off points applied to | --- |
| Smallest detectable change if described | --- |
| Smallest detectable change applied to | --- |
| Completion time by the patient | <15 minutes |
| Scoring time by the assessor | - minutes |
| Training to score | Not necessary |
| Strengths | Easy to use |
| Limitations | --- |
| OTHER COMMENTS | |
| Other Comments | --- |