Comparative Analysis of Plant-Based and Animal-Based Diets on Cardiovascular Health Outcomes

Thesis Abstract

This study investigates the comparative impact of plant-based and animal-based diets on cardiovascular health outcomes within a diverse adult population, addressing the growing global prevalence of cardiovascular diseases and the increasing adoption of differing dietary patterns. Despite extensive research linking diet and cardiovascular risk, clear distinctions in the effects of diet types—particularly plant-based versus animal-based—remain insufficiently explored within specific demographic contexts, necessitating comprehensive analysis to inform public health recommendations and individual dietary choices. The primary aim is to analyze and compare the associations of plant-based and animal-based dietary patterns with key cardiovascular health indicators, including blood pressure, lipid profiles, and arterial stiffness, among adults aged 30 to 65 years. The study employs a cross-sectional research design grounded within the health belief model and social cognitive theory, positing that dietary behaviors and subsequent health outcomes are influenced by individual perceptions, social influences, and knowledge. The target population comprises 1,200 adults recruited from urban healthcare facilities using stratified random sampling to ensure proportional representation across age, gender, socioeconomic status, and urban residency. Data collection instruments encompass validated food frequency questionnaires (FFQ), physical health assessments including sphygmomanometers, lipid panel testing, carotid intima-media thickness measurements via ultrasound, and structured interviews on dietary habits and lifestyle factors. The reliability of the FFQ is established through Cronbach’s alpha coefficients above 0.80, and validity is confirmed via concurrent dietary recalls for a subset of participants. Quantitative data will be analyzed using multivariate regression models to assess the relationships between diet types and cardiovascular outcomes, controlling for confounding variables such as physical activity, smoking, and socioeconomic status. The analysis plan includes descriptive statistics, analysis of variance (ANOVA) to compare means across dietary groups, and logistic regression to determine the likelihood of adverse cardiovascular indicators associated with each diet type. The study also aims to perform subgroup analyses based on age groups and gender. The expected findings suggest that participants adhering predominantly to plant-based diets will exhibit significantly lower blood pressure, reduced LDL cholesterol levels, and decreased arterial stiffness compared to their animal-based diet counterparts. It is anticipated that these associations will remain robust after adjustment for confounders, supporting the hypothesis that plant-based diets confer protective effects against cardiovascular risk factors. This research contributes to the existing body of knowledge by providing context-specific, empirical evidence on diet-related cardiovascular health outcomes, filling identified gaps regarding different population segments and dietary patterns. It advances understanding of the mechanisms by which dietary composition influences vascular and metabolic health, thereby informing tailored nutritional guidelines and interventions. The findings are expected to reinforce the importance of dietary quality in cardiovascular disease prevention strategies and underscore the need for public health policies promoting increased intake of plant-based foods. Concluding, the study emphasizes that promoting plant-based dietary patterns could serve as an effective, accessible approach to reducing cardiovascular disease burden in urban adult populations. It recommends integrating dietary education into primary healthcare, encouraging dietary shifts towards plant-based diets, and conducting longitudinal studies to establish causal relationships. Future research should explore the long-term effects of dietary transitions on cardiovascular health, investigate the role of diet quality within plant-based paradigms, and evaluate the impact of socio-cultural factors on dietary choices and health outcomes. Overall, this research underscores the significance of dietary pattern assessment in cardiovascular disease prevention and offers a foundation for evidence-based nutritional policies tailored to diverse populations.