All these results indicate that depression is a common factor influencing a middle-aged adult's quality of life. Lim and Auh's study [10] confirmed that depression was the most powerful factor influencing middle-aged adults' quality of life. Therefore, it is very important to make a primary assessment and monitor the symptoms of depression continuously, while developing intervention strategies that relieve depression. On the other hand, in this study, body image was a potent predictor influencing the quality of life in middle-aged adults, suggesting that perception of one's body image can strongly influence quality of life. Adults in middle age commonly tend to have a negative body image as their physical attraction decreases on the account of the aging process and climacteric symptoms