Over half of residents living in Canadian long-term care (LTC) homes are over 85 years old, and the majority have some form of cognitive impairment.1 These residents have complex healthcare needs and require specialized care.1 However, pervasive inequities, deficiencies, and challenges have burdened the sector for decades, leading to contexts where LTC homes have difficulty providing high quality care.2  Experts argue that routine collection of patient-reported measures used as a part of care quality evaluation practices can promote person-centred care and improve quality of care.3 In response, the Office of the Seniors Advocate (an independent office within the public sector) implemented province-wide surveys in 2017 (9,605 resident and 9,604 family survey responses from 292 LTC homes) and in 2023 (10,872 resident and 7,880 family survey responses from 297 LTC homes) measuring resident and family perceptions of care quality in LTC homes across British Columbia, Canada. This mixed-methods case study will determine if and how these data can be used to influence care quality at various levels of decision-making: micro (resident/ caregiver/staff member), meso (LTC/advocacy group leadership), and macro (LTC policy-makers). Using a person-centred framework, evidence from documents, archival records, and two phases of interviews with participants from each decision-making level will be analyzed using framework/time-series/explanation building analyses. Descriptive statistics from surveys will be used to compare care quality changes over time. An advisory council of knowledge-users from each decision-making level are meeting quarterly to provide perspectives and experiential knowledge and will co-create actionable strategies to describe how survey data can be used in practice. The findings can help shed light on how routinely-collected patient-reported measures can be used to promote person-centred care and impact care quality in LTC homes. Canadian Institute for Health Information. (2020). https://www.cihi.ca/en/profile-of-residents-in-residential-and-hospital-based-continuing-care-2018-2019  Estabrooks et al. (2020). https://doi.org/10.1139/facets-2020-0056 Edvardsson et al. (2019). https://doi.org/10.1177/2333721419842672