Care-giver health-related quality-of-life (QoL) as a predictor of nursing-home placement of family-member patients with dementia was evaluated (using the SF-36 questionnaire) in 181 care providers (78% females; mean age 63 years) at the start and at the end of 12 months of follow-up. The patients and their carers were evaluated at home or at the local Primary Health-care Centers (n = 37) in the area of Barcelona (Catalunya, Spain). Data were evaluated using logistic regression analysis with nursing-home placement of patients as the main outcome measure, and the care-givers' QoL, demographic, medical, social and cognitive variables as covariates. The incidence rate of nursing-home placement was 10.5% (95%CI: 6.4-15.9). Carers of patients who had not been placed in a nursing home had better QoL scores, even after controlling for potential confounding factors. The adjusted odds ratio of being admitted to a nursing home was 6.4 (95%CI: 2.1-19.0) for patients cared-for by relatives who rated their health as being much worse compared with the previous year. The care-giver's poor health-related QoL significantly influenced rates of nursing-home admission of patients in their care.