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The prevalence of knee buckling, or “giving way,” in general populations has not been well characterized. In a cross-sectional, population-based study, experience with this condition was assessed among members of the Framingham Offspring Study; this cohort was supplemented with other Framingham residents recruited through random-digit dialing.
Of 2351 participants (age range, 36–94), 12% reported at least one episode of knee buckling in the past 3 months. Of those who experienced buckling, most (78%) reported more than one episode, and 13% reported falling during an episode. Buckling occurred most commonly during these activities: walking, stair climbing, and twisting or turning. Pain, higher body-mass index, worse physical function, and qua…