Background. Cardiometabolic risk factors, including hypertension, are increasingly appearing in childhood. Current evidence on the association between childhood diet and blood pressure is inconclusive and limited to cross-sectional studies. Aim. To examine the associations between dietary patterns across childhood and subsequent blood pressure, and whether these associations are explained by BMI. Methods. Data from 4314 children aged 2 to 10 who participated in the Longitudinal Study of Australian Children were analysed. Dietary scores were computed based on similarity of intake to the Australian Dietary Guidelines. Group-based trajectory modelling was used to identify distinct dietary trajectories based on participant's individual dietary scores at up to five timepoints between age 2 to 10. Linear regression models tested the association between trajectory groups and blood pressure measured at age 10. Models were adjusted for relevant covariates and BMI. Results. Four dietary trajectories were identified, labelled as "never healthy" (5.8%), "moderately healthy" (6.5%), "becoming...

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