In addition, respondents were requested to complete a brief questionnaire which included questions on physical health, personality, and other measures. These items were assessed using a questionnaire rather than during the interview to reduce the length of the interview. Respondents were offered two methods for completing the questionnaire survey: either by completing a ‘paper and pen’ survey and returning it to QIMR via post or by completing the survey over the Internet (after logging on with a unique ID and password, supplied by QIMR). Response rates for the questionnaire were excellent: 93% of those interviewed also completed the questionnaire, with 75% of those opting to complete the Internet version of the questionnaire.
