Introduction: The public health system is of central importance in efforts to reduce the burden of chronic disease, yet there are no national data on organizational capacity (OC) or dissemination practices pertaining to chronic disease prevention (CDP) programming in the public health system. The aim of this thesis is to investigate OC and dissemination practices within the Canadian public health system. Two new conceptual models pertaining to these constructs were developed, and a survey of all public health organizations across Canada engaged in CDP was conducted in 2004-5. / Method: Data were collected in telephone interviews with persons most knowledgeable about CDP programming in 77 "resource" organizations that develop and transfer CDP innovations to other organizations, and 216 "user" organizations that adopt and deliver CDP programs in specific populations. Reliable measures of the constructs of interest were developed using principal components analyses. Levels of OC, its potential determinants, and involvement in CDP programming were compared across three types of organizations and across Canada. In addition, levels of 13 dissemination-related practices were compared across organizations and independent correlates of dissemination were identified in multiple linear regression. / Results: Levels of skill and involvement were highest for tobacco control and healthy eating programming; lowest for stress management, social determinants of health, and program evaluation. Any notable differences in skill levels favoured central Canada. Resource adequacy was low overall; lowest in eastern Canada and within formal public health organizations. Supports for OC were highest in central Canada and in grouped organizations. Dissemination practices most heavily engaged in included: Identification of barriers to adoption/implementation of the innovation, tailoring dissemination strategies and design of dissemination plan. There was little coherence across organizations in the number or types of dissemination practices engaged in. Skill at planning/implementing dissemination, external sources of funding, type of resource organization, attitude toward the process of collaboration, and user-centeredness were all positively associated with dissemination (R2=0,42; F value 8.20, p<0.0001). / Conclusions: These results provide a backbone for organizational research in public health systems. Strengths and gaps identified in OC and dissemination practices will guide strategic investment in the public health system.

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