This aimed to measure participants' satisfaction with their lives. The WHOQOL-100 Quality of Life Assessment was developed by a group of WHO collaborators in 15 international field centres simultaneously to produce an assessment of an individual's quality of life beyond their physical health that would be applicable cross-culturally. The WHOQOL-BREF was developed using data from this as an abbreviated version for use in, for example, large epidemiological studies where quality of life is only one variable of interest. It produces scores for four domains related to quality of life: physical health, psychological, social relationships and environment as well as one facet on overall quality of life and general health, and has been shown to demonstrate good validity, consistency and reliability [68]. The WHOQOL-BREF was used in the LBC1936 study for its brevity and conciseness and all but one of the 26 questions was utilised; the question regarding participants' sex lives was not deemed appropriate for this age group.