The PR1 provides a reliable measure of isometric knee flexor and extensor strength in healthy adults that could be used in the clinical setting, but absolute values may not be comparable to strength assessment by gold-standard measures.

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Aims: The purpose of this study is to determine whether the Five Repetition Sit to Stand Test (FRSTST) cutoff score for fall prediction in community-dwelling older adults (>15 s) is valid for predicting falls in individuals living in an assistedliving facility. Methods: Eighteen subjects (78-95 years old ±4.4 years) performed the FRSTST and were followed over a 12-month period. The incidence of falls was collected from facility incident reports after 3, 6, and 12 months. Results: The 6-month receiver operating curve (ROC) analysis revealed that a time of greater than 23.8 seconds demonstrated 85.71% sensitivity and 90.91% specificity (p = 0.0033) using a chi-square test. Age, weight, height, body mass index, length of stay at the facility, and Mini-Mental State Exam score were analyzed and found not predictive of falls at 3, 6, and 12 months. Conclusion: The FRSTST can be used semianually in this setting to predict falls using a score of 23.8 s, which is higher than the score for community-dwelling older adults adults. Possible explanations include lower physical and cognitive capabilities, access to 24-hour care, supervision of medications, less participation in risk behaviors, and environmental modifications. Clinical judgment and additional objective measures should be used in addition to this measure for a thorough assessment of fall risk.

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