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Standardized Questionnaires of Walking & Bicycling Database:

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Validation Studies:

Table 50. Late-Life Function and Disability Instrument (LLFDI)

Reference Methods Sample Summary Results
Sayers et al. 2004(103) LLFDI compared to a short physical performance battery (SPPB) and a self-paced 400-m walk (400-m W) (Pearson correlations) 101 men and women aged 80.8 ± 0.4 years
  400-mW SPPB
LLFDI
Overall function 0.69* 0.65*
Basic lower extrem. function 0.66* 0.63*
Advanced lower extrem. function 0.73 0.67*
* p < 0.001

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