Concordance and discordance between two measures of lower extremity function: 400 meter self-paced walk and SPPB

Aging Clin Exp Res. 2006 Apr;18(2):100-6. doi: 10.1007/BF03327424.


Background and aims: The purpose of the study was to assess the concurrent validity of the 400 meter self-paced walk test (400-m W) against the commonly used short physical performance battery (SPPB). A secondary purpose was to determine whether the 400-m W could better discriminate physical performance among high functioning older adults by examining the distribution of 400-m W scores.

Methods: 101 men and women (80.8+/-0.4 years) were recruited to participate in the study. The 400-mW and SPPB assessed lower extremity function. Lower extremity muscle strength, power, and contraction velocity was assessed using bilateral leg press (LP). Health history was obtained with questionnaire.

Results: 400-m W demonstrated moderate correlations with SPPB (Pearson r=0.74; p< 0.001). In 36 high functioning individuals (SPPB score= 10, 11, 12), participants above the median 400-m W performance time (n=20) had more medical conditions (2.8+/-0.4 vs 1.7+/-0.3; p=0.038), more reported falls (0.80+/-0.2 vs 0.19+/-0.1; p=0.016), more medications (3.7+/-0.4 vs 1.8+/-0.4; p=0.001), had lower LP power at 70% of the one repetition maximum (1RM) (336+/-45 W vs 663+/-78 W; p=0.001) and 40% 1RM (329+/-43 W vs 580+/-75 W; p=0.005), and had slower LP contraction velocity at 40% 1RM (77+/-5.5 m/s vs 112+/-8.4 m/s; p=0.001) compared with those below the median (n=16).

Conclusions: A substantial number of apparently well functioning older adults demonstrated some limitations in the ability to walk 400 meters. Use of the 400-m W may be justified to obtain information to better discriminate among high functioning elderly.

Publication types

  • Comparative Study
  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Validation Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Cross-Sectional Studies
  • Female
  • Geriatric Assessment / methods*
  • Humans
  • Lower Extremity / physiology*
  • Male
  • Mobility Limitation
  • Muscle Contraction / physiology
  • Predictive Value of Tests
  • Psychomotor Performance / physiology*
  • Surveys and Questionnaires
  • Task Performance and Analysis*
  • Walking / physiology*