Introduction: The global population is aging, and the number of elderly people continues to increase worldwide. The increase in the elderly population is followed by an increase in problems due to degenerative processes that have an impact on the quality of life of the elderly. Several factors that affect the quality of life of the elderly include physical activity, functional abilities, and depression. Methodology: The study design was cross-sectional. Based on the quota sampling in East Jakarta, 180 elderly were selected as the sample. WHOQOL-BREF was used to measured quality of life of independent variables. GPAQ, IADL-Barthel Index, GDS were used to measure dependent variables of physical activity, functional ability and depression, respectively. The Data collection method was an interview using a questionnaire. Data analysis includes univariate and bivariate analysis using Chi-Square test and multivariate analysis using Logistic Statistics test using Enter method. Results: Most of the elderly have a good quality of life (77.2%). There was a significant corellation between physical activity, functional ability, depression and the quality of life of the elderly. The most important factor was physical activity and the P values and OR were 0.014 and OR 3.409, respectively after being controlled by the variables of functional ability and depression. Conclusion: The finding indicated physical activity was the key factor of quality of life. In order to support elderly to exercise regularly and safely, cooperation between local governments, communities, and families is needed to develop interesting exercise/leisure sport programs and provide support facilities for the elderly. Keywords— quality of life, physical activity, functional ability, depression, elderly

ABSTRACT Abrasion is damage to dental tissue due to foreign objects, such as toothbrushes and toothpastes that contain abrasive ingredients. Abrasion caused by brushing teeth in a horizontal direction and with excessive emphasis. This study aims to obtain an overview of the relationship between the characteristics and habits of brushing teeth with the incidence of dental abrasion in employees of the Al-Ikhlas Masjid Cilandak Foundation in Jakarta. This research is a descriptive study with a cross sectional design. The research sample used total sampling totaling 32 employees of Masjid Al-Ikhlas Foundation. Data collection through direct interviews and observations by filling out checklist sheets and dental abnormalities (tooth abrasion) cards. Data analysis was conducted in univariate and bivariate. The results of univariate analysis showed that the incidence of tooth abrasion was mostly in the high category (53.1%), employee age> 38 years (56.3%), female sex (56.3%), tooth brushing frequency <3 times (62, 5%), and the tooth brushing technique is mostly good (56.3%). The results of bivariate analysis, variables that were significantly associated with dental abrasion events were the frequency of tooth brushing (p = 0.035 and OR = 7,000), and tooth brushing techniques (p = 0.029 and OR = 7.333). Keywords: Dental abrasion, characteristics, and habit of brushing teeth