A self-response questionnaire was designed to obtain information about work/ rest patterns, usual sleep patterns, overall fatigue experience, the perceived impact of fatigue and recent injury, and near injury experience. Demographic and employment information was also obtained. Information about ethnicity was obtained using the recommended multiethnic response format from the New Zealand Census, which asks respondents to select ethnic groups to which they consider they belong (Statistics New Zealand, 1997). Respondents indicating New Zealand Maori as one of their selected options to the question were classified as Maori for analysis.