Among aging adults living with diabetes or prediabetes, the mind and the body do not fail in isolation — a large multinational study has found that the intertwined trajectories of depression and cognitive decline carry a measurably higher risk of stroke than either condition alone. Drawing on cohorts from the United States, England, and China, researchers have traced how these two dimensions of mental health move together over time, and how their joint deterioration marks a state of deeper vulnerability. The findings invite clinicians to look not just at where a patient stands today, but at th