A measure of quality of life in early old age: The theory, development and properties of a needs satisfaction model (CASP-19)

Quality of life is the subject of much research. However it lacks an agreed theoretical basis. In studies with older populations(ill) health has been used as a proxy measure for quality of life (QoL). We have developed a needs satisfaction measure of QoL in early old age. Our measure has four ontologically grounded domains: conal, autonomy, pleasure, and self-realization. The measure was piloted with focus groups, a self-completion pilot, and cognitive interview testing. This produced a 22-item scale that was included in a postal questionnaire and sent to 286 people aged 65-75 years.A 92% response rate was achieved. The scale was reduced to 19 items on the basis of statistical analysis. The domains have…