Using the 12-item Short Form health survey (SF-12) to measure quality of life among older people.
AIMS: To present descriptive data, study psychometric abilities, and investigate the characteristics of non-respondents to SF-12. METHOD: The study had a randomized sample (n=4278; age: 75-105) stratified in four age groups. Factor analyses were performed to investigate the factor structure of the instrument, and convergent and discriminant validity was assessed by correlation between summary scor