Computer tailored information to influence nutrition, smoking and exercise habits; testing the application at the community level [ALOM: Advies over Leefstijl Op Maat; Advice about Lifestyle through Tailoring]

The goal is to test the effectiveness of computer tailored information (CTI) at the community level about nutrition, smoking and exercise, and to analyse facilitating and hindering factors for providing this method at the community level. Citizens' attention for the possibility of obtaining personal counselling via a personalised letters will be generated through various mass media approaches at the community level. Persons interested to participate will be randomly assigned to an experimental condition consisting of receiving three times personal letters about their nutrition, smoking and exercise habits and suggestions for change or further improvement. Persons in the control condition will receive no information. It is expected that the results of CTI on the three lifestyles will be comparable to those found in earlier RCT studies that addressed these behaviours separately. Process evaluations will give information on the respondent's reactions, and about facilitating and hindering factors for the RHS when providing this service.