TY - JOUR
T1 - Validation of Perceived Mental Fatigability Using the Pittsburgh Fatigability Scale
AU - Renner, Sharon W.
AU - Bear, Todd M.
AU - Brown, Patrick J.
AU - Andersen, Stacy L.
AU - Cosentino, Stephanie
AU - Gmelin, Theresa
AU - Boudreau, Robert M.
AU - Cauley, Jane A.
AU - Qiao, Yujia
AU - Simonsick, Eleanor M.
AU - Glynn, Nancy W.
N1 - Funding Information:
This work and S.W.R. was supported by the National Institute on Aging (U19 AG063893, U01 AG023712, U01 AG023744, U01 AG023746, U01 AG023749, and U01 AG023755). Additionally, the National Institutes of Health/National Institute on Aging Claude D. Pepper Older Americans Independence Center at the University of Pittsburgh, Research Registry and Developmental Pilot Grant (P30 AG024827), and the Intramural Research Program, National Institute on Aging, supported N.W.G. to develop the Pittsburgh Fatigability Scale. The Baltimore Longitudinal Study of Aging is supported by the National Institute on Aging (Grant number: 03‐AG‐0325). The Epidemiology of Aging training grant at the University of Pittsburgh funded by the National Institute on Aging (T32 AG000181) supported T.G. A National Institute on Aging grant (K01AG057798) supported S.L.A.
Publisher Copyright:
© 2021 The American Geriatrics Society
PY - 2021/5
Y1 - 2021/5
N2 - Objectives: Establish reliability, concurrent and convergent validity of the Pittsburgh Fatigability Scale (PFS) Mental subscale. Design: Cross-sectional. Setting: Older adults from two University of Pittsburgh registries, Baltimore Longitudinal Study of Aging (BLSA), and Long Life Family Study (LLFS). Participants: PFS Mental subscale validation was conducted using three cohorts: (1) Development Sample (N = 664, 59.1% women, age 74.8 ± 6.4 years, PFS Mental scores 10.3 ± 9.1), (2) Validation Sample I—BLSA (N = 430, 51.9% women, age 74.5 ± 8.2 years, PFS Mental scores 9.4 ± 7.9), and (3) Validation Sample II—LLFS (N = 1,917, 54.5% women, age 72.2 ± 9.3 years, PFS Mental scores 7.5 ± 8.2). Measurements: Development Sample, Validation Sample I—BLSA, and Validation Sample II—LLFS participants self-administered the 10-item Pittsburgh Fatigability Scale. Validation Sample II—LLFS completed cognition measures (Trail Making Tests A and B), depressive symptomatology (Center for Epidemiologic Studies—Depression Scale, CES-D), and global fatigue from two CES-D items. Results: In the Development Sample and Validation Sample I—BLSA, confirmatory factor analysis showed all 10 items loaded on two factors: social and physical activities (fit indices: SRMSR = 0.064, RMSEA = 0.095, CFI = 0.91). PFS Mental scores had strong internal consistency (Cronbach's α = 0.85) and good test-retest reliability (ICC = 0.78). Validation Sample II—LLFS PFS Mental scores demonstrated moderate concurrent and construct validity using Pearson (r) or Spearman (ρ) correlations against measures of cognition (Trail Making Tests A (r = 0.14) and B (r = 0.17) time), depressive symptoms (r = 0.31), and global fatigue (ρ = 0.21). Additionally, the PFS Mental subscale had strong convergent validity, discriminating according to established clinical or cognitive testing cut points, with differences in PFS Mental scores ranging from 3.9 to 7.6 points (all P <.001). All analyses were adjusted for family relatedness, field center, age, sex, and education. Conclusions: The validated PFS Mental subscale may be used in clinical and research settings as a sensitive, one-page self-administered tool of perceived mental fatigability in older adults.
AB - Objectives: Establish reliability, concurrent and convergent validity of the Pittsburgh Fatigability Scale (PFS) Mental subscale. Design: Cross-sectional. Setting: Older adults from two University of Pittsburgh registries, Baltimore Longitudinal Study of Aging (BLSA), and Long Life Family Study (LLFS). Participants: PFS Mental subscale validation was conducted using three cohorts: (1) Development Sample (N = 664, 59.1% women, age 74.8 ± 6.4 years, PFS Mental scores 10.3 ± 9.1), (2) Validation Sample I—BLSA (N = 430, 51.9% women, age 74.5 ± 8.2 years, PFS Mental scores 9.4 ± 7.9), and (3) Validation Sample II—LLFS (N = 1,917, 54.5% women, age 72.2 ± 9.3 years, PFS Mental scores 7.5 ± 8.2). Measurements: Development Sample, Validation Sample I—BLSA, and Validation Sample II—LLFS participants self-administered the 10-item Pittsburgh Fatigability Scale. Validation Sample II—LLFS completed cognition measures (Trail Making Tests A and B), depressive symptomatology (Center for Epidemiologic Studies—Depression Scale, CES-D), and global fatigue from two CES-D items. Results: In the Development Sample and Validation Sample I—BLSA, confirmatory factor analysis showed all 10 items loaded on two factors: social and physical activities (fit indices: SRMSR = 0.064, RMSEA = 0.095, CFI = 0.91). PFS Mental scores had strong internal consistency (Cronbach's α = 0.85) and good test-retest reliability (ICC = 0.78). Validation Sample II—LLFS PFS Mental scores demonstrated moderate concurrent and construct validity using Pearson (r) or Spearman (ρ) correlations against measures of cognition (Trail Making Tests A (r = 0.14) and B (r = 0.17) time), depressive symptoms (r = 0.31), and global fatigue (ρ = 0.21). Additionally, the PFS Mental subscale had strong convergent validity, discriminating according to established clinical or cognitive testing cut points, with differences in PFS Mental scores ranging from 3.9 to 7.6 points (all P <.001). All analyses were adjusted for family relatedness, field center, age, sex, and education. Conclusions: The validated PFS Mental subscale may be used in clinical and research settings as a sensitive, one-page self-administered tool of perceived mental fatigability in older adults.
KW - cognitive performance
KW - depressive symptomatology
KW - fatigue
KW - physical function
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U2 - 10.1111/jgs.17017
DO - 10.1111/jgs.17017
M3 - Article
C2 - 33469914
AN - SCOPUS:85100058784
SN - 0002-8614
VL - 69
SP - 1343
EP - 1348
JO - Journal of the American Geriatrics Society
JF - Journal of the American Geriatrics Society
IS - 5
ER -