By Meredith Melnick A lot of factors determine your health-related quality of life, including your weight. In general, the heavier you are — that is, the further you veer into overweight territory — the worse your quality of life. But a new survey finds that some groups, such as women, are more negatively affected than others. For the survey, researchers asked 3,844 U.S. adults aged 35-89 a series of questionnaires designed to gauge the respondents' physical and mental quality of life. The questions included measures of mobility, pain, cognition, "vitality," anxiety and depression, among other factors. Overall, the survey found, people with "normal" body mass index (ranging from 18.5 to 24.9) reported better health-related quality of life than overweight (BMI of 25 to 29.9) or obese (BMI of 30 to 50) respondents. But when researchers looked more closely at African American participants, they found that those in the overweight group reported high...