|An ecological perspective: levels of influence|
|Intrapersonal Level||Individual characteristics that influence behavior, such as knowledge, attitudes, beliefs, and personality traits|
|Interpersonal Level||Interpersonal processes and primary groups, including family, friends, and peers that provide social identity, support, and role definition|
|Institutional Factors||Rules, regulations, policies, and informal structures, which may constrain or promote recommended behaviors|
|Community Factors||Social networks and norms, or standards, which exist as formal or informal among individuals, groups, and organizations|
|Public Policy||Local, state, and federal policies and laws that regulate or support healthy actions and practices for disease prevention, early detection, control, and management|
Source: National Cancer Institute. Theory at a glance. Available at http://www.cancer.gov/cancertopics/cancerlibrary/theory.pdf webcite (Cited May 13, 2011).
Tarimo et al.
Tarimo et al. BMC Public Health 2012 12:529 doi:10.1186/1471-2458-12-529