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Little is known about the health problems of the fastest-growing segment of the population. Three major community-based studies present prevalence information on physical and mental disabilities among the oldest old. These data also illustrate the limitations of interpretations in cross-sectional studies, and emphasize the value of prospective investigations of populations aged 85 and older. Although more costly and time-consuming, such prospective longitudinal studies are indispensable to sound policy planning.
Cornoni‐Huntley et al. (Tue,) studied this question.