Objective The Chinese Guidelines for Prevention and Treatment of Hypertension 2024 updated the recommendations of the third blood pressure measurement. This study explored the influence of the new recommendations on the detection rate of hypertension.

Methods The data of three blood pressure measurements of 1 133 adult outpatients in the Second Affiliated Hospital of Nanchang University from June 2022 to December 2023 were reanalyzed. After the patient sat quietly for 5 min, the blood pressure of right arm was measured with an electronic sphygmomanometer (Omron, HEM-7133) for 3 times, with an interval of 1 min. According to the recommendations of the third blood pressure measurement in 2018 edition (the difference between two blood pressure readings ＞5 mmHg) and 2024 edition (the difference between two blood pressure readings ＞10 mmHg) of Chinese Guidelines for the Prevention and Treatment of Hypertension, the proportion of participants who need to take three blood pressure measurements was calculated, and the final blood pressure level and the detection rate of hypertension were also calculated. The consistency was tested by Kappa coefficient analysis.

Results According to the 2018 guidelines, the proportion of patients who need to measure their blood pressure three times was 68.5% (776/1 133). According to the 2024 guidelines, the ratio was 38.7% (439/1 133). According to the 2018 guidelines and 2024 guidelines, the detection rate of hypertension was 64.0% (725/1 133) and 65.8% (745/1 133), respectively, and the difference was not statistically significant (χ²=0.775, P=0.379). The Kappa value of consistency test was 0.957 (95%CI 0.939–0.975).

Conclusion Compared with the 2018 guidelines, according to the 2024 guidelines, the proportion of outpatients who need three blood pressure measurements is significantly reduced, but the detection rate of hypertension has not changed much.