Validation of the Spanish version of the Pittsburgh Fatigability Scale for older adults
The Pittsburgh Fatigability Scale (PFS) is the only validated scale for measuring perceived fatigability in older adults.
We validated the PFS Spanish version by assessing convergent validity with respect to several measures of physical performance, physical activity, physical function and disability.
A cross-sectional validation study of 79 community-dwelling older adults aged 70 and older from Barcelona, Spain was included. Translation–retrotranslation was performed. Convergent validity was assessed in relation to physical activity and performance measurements, and analyzed with Spearman correlation coefficients, a linear trend test and non-linear regression. We also assessed the discriminant validity of the PFS physical score between participants with different physical activity and performance levels.
Higher PFS physical scores were inversely associated with the Short Physical Performance Battery (r = − 0.5, p < 0.001) and weak to moderately correlated with gait speed (r = 0.38, p = 0.001), and self-reported weekly walking time (r = 0.24, p = 0.035).
The PFS is a novel, brief instrument to assess fatigability in Spanish-speaking older adults, with good convergent validity against physical performance measurements. Thus, the PFS can be used in Spanish-speaking populations.
KeywordsFatigability Fatigue Validity Spanish version
Rosario Jimenez, Esperança Palacios and Palmira Villafuerte of the ABS Vallcarca-Sant Gervasi for their help in conducting the clinical trial and assessments. Jordi González-Guerra and Irene Garcia for their help in conducting the interviews. Àlex Domingo, Gabriela del Valle Gómez, Cristina Puchol, Ignasi Bolibar, Alejandro Carrera Rodriguez for their help in the translation procedure of the Spanish version of the PFS.
The sub-study is part of a clinical trial “Exercise Park Equipment for Improving Physical Function and Physical Activity Levels in the Elderly” (NCT02375594) that had partial funding by Lappset España—Lappset Group Oy. The NCT02375594 clinical trial sponsor had no role in conducting the analyses, interpreting or reviewing the data included in this paper. The original Pittsburgh Fatigability Scale development and validation was funded by a Pittsburgh Claude D. Pepper Older Americans Independence Center Developmental Pilot Grant NIH P30 AG024826 and also from the Intramural Research Program, National Institute on Aging, National Institutes of Health.
Compliance with ethical standards
Conflict of interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
This study was approved by the Animal and Human Experimentation Ethics Committee of the Universitat Autónoma de Barcelona.
Written informed consent was collected from all participants.
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