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Table 3 Concurrent and convergent validity of the PFS Physical scores: Simplified-Chinese Version with physical performance and physical ability measures

From: Validation of perceived physical fatigability using the simplified-Chinese version of the Pittsburgh Fatigability Scale

Measures LS means (SE) a Difference AUC (95% CI)
Yes No Mean (SE) P-Value
Low SPPBb 27.0 (3.4) 19.4 (3.0) 7.7 (0.4) < .001 0.77 (0.72, 0.81)
Slower gait speed c 26.9 (3.3) 19.0 (4.0) 7.8 (0.4) < .001 0.76 (0.72, 0.80)
Poor lower limb strengthd 26.8 (2.4) 24.6 (4.2) 2.3 (0.4) < .001 0.78 (0.74, 0.82)
Low mobilitye 25.7 (4.2) 21.7 (4.1) 4.3 (0,9) < .001 0.77 (0.72, 0.81)
ADL dependencef 35.1 (5.7) 24.4 (3.9) 10.7 (0.6) < .001 0.87 (0.84, 0.90)
IADL dependenceg 28.1 (4.1) 21.3 (3.3) 6.8 (0.4) < .001 0.81 (0.77, 0.84)
  1. LS means Least Squares means, SE Standard Error, AUC Area Under the Curve (the different levels of physical performance and daily living performance were used as the state variable and the PFS Physical scores were used as the test variable directly), SPPB Short Physical Performance Battery, ADL Activities of Daily Living, IADL Instrumental Activities of Daily Living
  2. a Adjusted for age and sex
  3. b Defined as SPPB < 10 points
  4. c Defined as gait speed < 1.0 m/s
  5. d Defined as the time to performed chair stand test ≥ 16.7 s or not able to do 5 stands
  6. e Defined as Timed Up and Go Test time ≥ 14.0 s
  7. f Defined as Barthel Index ≤ 80
  8. g Defined as IADL ≤ 7