Introduction: Disaster preparedness is defined as actions that ensure resources necessary to carry out an effective response are available before a disaster. Disaster preparedness requires a thorough understanding of the factors that influence performance or nonperformance of disaster preparedness behaviors (DPB). The major aim of this research was to further our understanding of DPB based on the theory of planned behavior (TPB).

Method: This was a cross-sectional study of factors determining of DPB in a representative sample of 1233 Tehran inhabitants. Measures derived from the TPB were obtained in the unprepared and prepared people.

Results: Consistent with the theory, intentions to do DPB could the person predicted from attitudes, subjective norms, and perceived behavioral control with respect to DPB; and actually doing DPB was strongly related to intentions and perceptions of control assessed in the prepared people. Theoretical and practical implications of these findings are discussed.

Conclusion: An effective intervention will not only have to encourage people of the desirability of DPB, but also to provide them with the skills and means to do it. The more strongly they can be made to feel that they have control over DPB, the more likely they are to carry out their intentions. That is, heightened perceived control tends to strengthen people’s motivation to do DPB.

Key words: theory of planned behavior; disaster;  preparedness  

Background: Tehran is vulnerable to natural hazards, especially earthquakes. Disaster preparedness behaviors (DPB) are measures that can mitigate the adverse consequences of disasters. Demographic factors affect DPB, however, the role of some of these factors is not still clear. By understanding these effects, disaster specialists could design interventions toward specific demographics. In the present study, we aimed to investigate demographic determinants of DPB.

Methods: This cross-sectional survey was conducted in August 2014. The target population included inhabitants of Tehran who were 18 years or older. A total of 1250 participants were selected randomly and interviewed using a standardized questionnaire.

Results: Results of our study showed that monthly income level, previous disaster experience, residential district and occupation are demographic factors that influence DPB significantly. However, disaster preparedness was not affected by gender, educational level, number of household members, home type, home ownership and being the head of household.

Conclusion: To promote DPB in Tehran, disaster specialists should focus on improving DPB in low-income and unemployed people, and individuals who live in high risk districts, especially in those who have not experienced disasters.

Key words: Disaster, Preparedness behavior, Demographic determinants.