The SF-36 is one of the most widely used questionnaires for measuring self-reported physical and mental health status. The SF-36 questionnaire consists of 36 questions measuring physical and mental health status in relation to eight health scales. Scores are expressed on a 1–100 scale for each of the eight health scales, with higher scores representing better self-perceived health (Ministry of Health 2004a). Non-Māori adults generally rated their health higher than Māori adults.