Some teens show a lack of empathy and guilt. These are known as callous-unemotional (CU) traits. They are now used to help diagnose disruptive behavior disorders. This is because they can hint at what might happen in the future. However, studies tracking these traits over time have given mixed results. This is especially true when considering the person's level ...

Aging is tough on the body. For many older adults in China, it brings unwanted challenges. Bladder and bowel problems, known as urinary and defecatory dysfunction (UDD), are quite common. These issues can greatly affect the quality of life. Yet, there is a surprising lack of long-term studies on what makes these problems worse over time. Most studies look at the...