LAUSR

Frailty among older adults is not a normal part of aging, but is common and can lead to an increased incidence of fractures, hospitalizations, and deaths, among other problems. 1 The Mediterranean diet has been shown to reduce incident frailty, with a pooled odds ratio of 0.44 for individuals who are most adherent to the diet. 2 It is tempting to think one could take supplements, such as omega-3 fatty acid and vitamin D 3 , and receive similar benefits for frailty prevention, but studies to date assessing the effect of dietary supplements on frailty have shown no benefit. 2,3 Orkaby and colleagues 4 assessed the association of vitamin D 3 and omega-3 fatty acid supplements with change in frailty among 25057 community-dwelling older adults without cancer or cardiovascular disease during 5 years. Frailty was measured using the Rockwood frailty index, with a sensitivity analysis done on a subpopulation using the Fried physical phenotype. This well-done ancillary study of a randomized clinical trial with a 2 × 2 factorial design aligned with prior research finding no significant difference in frailty incidence or change with vitamin D 3 or omega-3 fatty acid supplementation compared with placebo. 4 Their study population was large and diverse, but rates of frailty were lower than in the general population, alluding to their sample being healthier than the general population. In addition, participants in this study did not have insufficient levels of vitamin D 3 , and almost half of them ate more than 1.5 servings of fish per week, and so were getting at least some omega-3 fatty acid. A strength of this study was the use of the Frailty Index by Rockwood and colleagues to measure frailty. The Frailty Index is a validated tool to assess deficits in health on a score between 0 (absence of deficit) and 1 (presence of deficit). 5 The sensitivity analysis conducted by Orkaby and colleagues 4 found no significant changes to their results when substituting the Fried physical phenotype definition of frailty. The Frailty Index is an easy-to-use tool to define overall health and a valuable addition to the study of interventions to prevent,