Over the past 20 years or so, the risk for US men and women of suffering from cognitive impairment and dementia has increased. This is the conclusion of a new study by researchers at the Max Planck Institute for Demographic Research (MPIDR) and colleagues that takes into account learning effects when repeating the same dementia test.
The burden might be heavier than long assumed: For years, most studies using survey data suggested that the risk of suffering from cognitive impairment is declining in high-income countries. They often use longitudinal surveys in which the same individuals take the same test over and over. This results in…
