Active Ageing: A Framework for the Global Strategy for the Prevention of Falls in Older Age

Every one has an opinion about their quality of life, but no one knows precisely what it means in general. John Stewart Mill noted that individual opinion about well-being was ‘the best means of knowledge immeasurably surpassing those that can be possessed by any one else’ (JS, 1885). Thus, quality of life is highly individualistic and might even be an ‘idiosyncratic mystery’ due to the high levels of variability between individuals, making it unsuitable for decision making. (Leplége, 1997 ).