the exclusion, data of 1948 individuals were analyzed for normative study. Of the study sample, 51.3% were female and 41.1% had less than five years of education (grouped as undereducated). Among the sociodemographic variables examined, age, gender, and education ac- counted for variance in 3MS scores. Younger age, male gender and higher educational attainment were associated with better 3MS perfor- mance. Normative values for both undereducated and educated ver- sions of 3MS-Turkish form were determined. Conclusions: A dementia screening test with normative values was developed for the Turkish population. The test will provide the opportunity for health professionals, including primary care workers to evaluate the cognitive performance based on age, gender and education level, in both educated and undereducated elderly. Studies for further psychometric features are ongoing. P4-549 THEME: EXPERIENCES OF CHILDREN LIVING WITH A FATHERWITH EARLY- ONSET DEMENTIA Yoshiko Ozawa, Japan University of Health Sciences, Satte, Japan. Contact e-mail: ozaway1102@yahoo.co.jp Background: Children who have a parent with early-onset dementia suffer from various problems. People are concerned about this problem in Japan. When they are young children and school age, they have prob- lems in situations where they are growing and developing. In adoles- cence, they have trouble finding a job, marrying, and they also worry about inheriting the disease.The aims of this study are to analyze the problems of children living with a parent with early-onset dementia and to ascertain how to assist them during this difficult time. Methods: Subjects were 2 individuals under the age of 20 who had a father diag- nosed with early-onset dementia. A semi-structured interview lasting about 90 minutes was conducted with each subject to ascertain the problems they faced because of their father’s condition. Interview tran- scripts were coded verbatim, categorized, and analyzed using an induc- tive qualitative approach.This study was approved by the Ethics Committee of the university and consent was obtained from subjects. Results: Subjects were ages 18 and 20, and one was male and the other was female. Their experiences were grouped into five categories: father figure, confusion as one’s parent’s condition worsened, family ties, and relationships with other people, and uneasiness about the future. These five categories were further divided into fifteen subcategories. Conclu- sions:Based on these findings, children under the age of 20 with a father with early-onset dementia still needed time to mature into adults, they lacked a strong father figure, and they were confused about the wors- ening of their parent’s condition. When the parent’s condition was ex- plained to the child, family ties strengthened and children were able to maintain their relationships with other people. In the future, children who have a father with early-onset dementia will need various forms of financial support and those children will need a forum in which to communicate with other children in the same situation. P4-550 CAN PEOPLE LIVING WITH DEMENTIA CO-PRODUCE RESEARCH DATA ABOUT THEIR MANAGEMENT OF MEDICINES? Taniya Sharmeen and Rosemary Lim, University of Reading, Reading, United Kingdom. Contact e-mail: r.h.m.lim@reading.ac.uk Background: Many people living with dementia (PLWD) take med- icines but there is limited representation of PLWD’s own voice, views and experience regarding medicine use and management in the existing relevant body of literature. PLWD have often been excluded from research for various reasons including perceptions that they are incapable of giving informed consent, have difficulties communicating and their contributions were considered to be of questionablevalidity. We aimed to involve PLWD as active partic- ipants in a research study exploring views and experiences of med- icines management. Methods: We used a combination of methods involving graphic elicitation and a phenomenological approach. Stage 1: PLWD as study participants were loaned a digital camera for two weeks and asked to take photographs of objects and places/ locations (not limited to their own home) that they view to be related to medicines and medicine-taking. Images were processed and analysed for bracketing purpose, thus mitigating preconcep- tions that may affect the research process. Stage 2: Images were used as cues for interviews. A phenomenological approach which focused on PLWD’s lived experiences was used in the interviews. Results: A total of 15 participants were recruited. Fifteen sets of photographs (range 3-20 per set, n¼129) were received. Thirteen participants were interviewed to date and ten actively participated. Seven participants planned and took pictures on their own. Three participants were prompted by their carers when taking pictures. Another three sets of photographs were taken by the carers. Partic- ipants who took pictures independently took the most pictures. Of those who did not manage to take photographs, family carers played an inhibitory role suggesting perceptions of PLWD’s incapability to understand study requirements. Conclusions: PLWD were co-pro- ducers of research data. They were actively involved in collecting research data by taking photographs that acted as cues for subse- quent interviews. The study methodology allowed PLWD to ex- press their views and represent their voices in an articulate and meaningful way thus eliminating doubt and questions regarding validity and credibility of data specifically on the first order con- structs. This study provides evidence for further discussions about involving PLWD in a sensitive and flexible way as active partici- pants in the research process. P4-551 DEVELOPMENT OF A COHORT OF MEDICARE PATIENTSWITH ADVANCED DEMENTIA Carolyn W. Zhu 1,2 , Stan Moore 3 , Chris Murtaugh 3 , 1 James J. Peters VA Medical Center, New York, NY, USA; 2 Icahn School of Medicine at Mount Sinai, New York, NY, USA; 3 Visiting Nurse Service of New York, New York, NY, USA. Contact e-mail: carolyn. zhu@mssm.edu Background: Medicare claims are often used to identify patients with dementia but lack information on disease severity. This study explores the feasibility of combing Medicare claims data and the Outcome and Assessment Information Set (OASIS) to identify pa- tients with advanced dementia. Methods: The sample consists of 1,025,856 Medicare beneficiaries with at least one home health care visit between 7/1/2009 and 6/30/2010 with at least one home health OASIS assessment in 2009. Individuals with Alzheimer’s disease and related dementias (ADRD) were identified using CMS Chronic Condition Data Warehouse definitions. Indicators for late-stage dementia were based on the presence of ICD-9-CM codes for medical complications, including pressure ulcers, eating disorders and malnutrition, aspiration pneumonia, and inconti- nence. OASIS symptom and functional status assessment items Poster Presentations: Wednesday, July 19, 2017 P1562