WHAT IS ALREADY KNOWN ABOUT THIS TOPIC?: The prevalence of hypertension in children and adolescents is increasing, which is closely associated with cardiovascular disease risk in adulthood. The Dietary Approaches to Stop Hypertension (DASH) has demonstrated effectiveness in reducing blood pressure in adults. However, limited evidence exists regarding its effects among children in China.

WHAT IS ADDED BY THIS REPORT?: This cross-sectional study found that 15.4% of Chinese children and adolescents aged 7 to 17 years had elevated blood pressure. The median DASH score was 24 [interquartile range (IQR) 21-28]. Students with higher DASH scores demonstrated a lower prevalence of elevated blood pressure compared to those with lower scores.

WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE?: DASH adherence was inversely associated with elevated blood pressure prevalence among students aged 7-17 years in China. Increasing adherence to the DASH dietary pattern could play an effective role in the prevention and management of hypertension among children and adolescents.