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

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Abstract

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-m W 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 ±04 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.

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Correspondence to Stephen P. Sayers PhD.

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Sayers, S.P., Guralnik, J.M., Newman, A.B. et al. Concordance and discordance between two measures of lower extremity function: 400 meter self-paced walk and SPPB. Aging Clin Exp Res 18, 100–106 (2006). https://doi.org/10.1007/BF03327424

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  • DOI: https://doi.org/10.1007/BF03327424

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