Sydney, Jul 21 (Conversation) artners do not simply grow old together, they often grow more alike. Decades of shared routines, environments and experiences leave couples with increasingly similar health profiles, a pattern long recognised for obesity, diabetes and heart disease and stroke. Could dementia now belong on that list? A new nationwide study from Taiwan suggests the answer is yes – but not for the reason many headlines might imply. The shadow of shared lives In this study involving almost one million married adults, researchers found that when one spouse developed dementia, the other was significantly more likely to receive