@article {8377, title = {Putative Cut-Points in Sarcopenia Components and Incident Adverse Health Outcomes: An SDOC Analysis.}, journal = {J Am Geriatr Soc}, volume = {68}, year = {2020}, month = {2020 Jul}, pages = {1429-1437}, abstract = {

OBJECTIVES: Analyses performed by the Sarcopenia Definitions and Outcomes Consortium (SDOC) identified cut-points in several metrics of grip strength for consideration in a definition of sarcopenia. We describe the associations between the SDOC-identified metrics of low grip strength (absolute or standardized to body size/composition); low dual-energy x-ray absorptiometry (DXA) lean mass as previously defined in the literature (appendicular lean mass [ALM]/ht ); and slowness (walking speed <.8 m/s) with subsequent adverse outcomes (falls, hip fractures, mobility limitation, and mortality).

DESIGN: Individual-level, sex-stratified pooled analysis. We calculated odds ratios (ORs) or hazard ratios (HRs) for incident falls, mobility limitation, hip fractures, and mortality. Follow-up time ranged from 1 year for falls to 8.8 {\textpm} 2.3 years for mortality.

SETTING: Eight prospective observational cohort studies.

PARTICIPANTS: A total of 13,421 community-dwelling men and 4,828 community-dwelling women. MEASUREMENTS Grip strength by hand dynamometry, gait speed, and lean mass by DXA.

RESULTS: Low grip strength (absolute or standardized to body size/composition) was associated with incident outcomes, usually independently of slowness, in both men and women. ORs and HRs generally ranged from 1.2 to 3.0 for those below vs above the cut-point. DXA lean mass was not consistently associated with these outcomes. When considered together, those who had both muscle weakness by absolute grip strength (<35.5 kg in men and <20 kg in women) and slowness were consistently more likely to have a fall, hip fracture, mobility limitation, or die than those without either slowness or muscle weakness.

CONCLUSION: Older men and women with both muscle weakness and slowness have a higher likelihood of adverse health outcomes. These results support the inclusion of grip strength and walking speed as components in a summary definition of sarcopenia. J Am Geriatr Soc 68:1429-1437, 2020.

}, issn = {1532-5415}, doi = {10.1111/jgs.16517}, author = {Cawthon, Peggy M and Manini, Todd and Patel, Sheena M and Newman, Anne and Travison, Thomas and Kiel, Douglas P and Santanasto, Adam J and Ensrud, Kristine E and Xue, Qian-Li and Shardell, Michelle and Duchowny, Kate and Erlandson, Kristine M and Pencina, Karol M and Fielding, Roger A and Magaziner, Jay and Kwok, Timothy and Karlsson, Magnus and Ohlsson, Claes and Mellstr{\"o}m, Dan and Hirani, Vasant and Ribom, Eva and Correa-de-Araujo, Rosaly and Bhasin, Shalender} }