Three thousand people are to be monitored under a plan to gauge public attitudes on health issues, the Department of Health announced yesterday. The $500,000 survey - to be carried out over two years - will for the first time provide comprehensive information to help the Government steer its health campaigns. 'It's not that we don't have an idea, but we only have information in bits and pieces gathered from small-scale studies over the years,' said assistant director Dr Chan Wai-man. 'We want to know people's total conception of health, as health means different things to different people.' The survey will focus on physical, psychological, social and environmental health. Respondents will be questioned on a range of issues, from exercise habits to views on health campaigns. The Health Department has commissioned the University of Hong Kong to conduct 20-minute interviews with 3,000 randomly selected people aged between 18 and 64. The survey will start on Monday. A report will be given to the steering committee on healthy living by October. Professor Lam Tai-hing from the University of Hong Kong said he expected half of the interviewees to join the department's Health Net programme. Under the scheme, which is expected to last about two years, participants will be mailed information or take part in group discussions. 'If successful, we hope to extend the monitoring scheme to about 10 years, which is now common in many countries,' Professor Lam said.