The different risk factors for isolated diastolic hypertension and isolated systolic hypertension: a national survey

Kun Xie, Xiufang Gao, Liwen Bao, Ying Shan, Haiming Shi, Yong Li, Kun Xie, Xiufang Gao, Liwen Bao, Ying Shan, Haiming Shi, Yong Li

Abstract

Background: Hypertension is highly prevalent and is one of the modifiable risk factors for cardiovascular outcomes. Isolated diastolic hypertension (IDH), however, tends to be ignored due to insufficient recognition. We sought to depict the clinical manifestation of IDH and isolated systolic hypertension (ISH) to find a more efficient way to improve the management.

Methods: Patients with primary hypertension aged over 18 years were investigated from all over the country using convenience sampling during 2017-2019. IDH was defined as systolic blood pressure (SBP) < 140 mmHg and diastolic blood pressure (DBP) ≥90 mmHg. ISH was defined as SBP ≥ 140 mmHg and DBP < 90 mmHg.

Results: A total of 8548 patients were screened, and 8475 participants were included. The average age was 63.67 ± 12.78 years, and males accounted for 54.4%. Among them, 361 (4.3%) had IDH, and 2096 had ISH (24.7%). Patients with IDH (54.84 ± 13.21 years) were much younger. Aging turned out to be negatively associated with IDH but positively associated with ISH. Multivariate logistic regression analysis showed BMI was a significant risk factor for IDH (OR 1.30, 95%CI 1.05-1.61, p = 0.018), but not for ISH (OR 1.05, 95%CI 0.95-1.16, p = 0.358). Moreover, smoking was significantly associated with IDH (OR 1.36, 95%CI 1.04-1.78, p = 0.026) but not with ISH (OR 1.04, 95%CI 0.90-1.21, p = 0.653).

Conclusions: Patients with IDH were much younger, and the prevalence decreased with aging. BMI and smoking were remarkably associated with IDH rather than ISH. Keeping fit and giving up smoking might be particularly efficient in the management of young patients with IDH.

Trial registration: NCT03862183 , retrospectively registered on March 5, 2019.

Keywords: Aging; Body mass index; Isolated diastolic hypertension; Isolated systolic hypertension; Smoking.

Conflict of interest statement

The authors declare that there is no conflict of interest.

© 2021. The Author(s).

Figures

Fig. 1
Fig. 1
The proportion of IDH and ISH in patients with hypertension according to age categories/ IDH: isolated diastolic hypertension. ISH: isolated systolic hypertension. SDH: systolic and diastolic hypertension. Different dimensions along with the horizontal axis are related to sample proportions
Fig. 2
Fig. 2
OR for the prevalence of IDH and ISH. A. OR for the prevalence of IDH; B. OR for the prevalence of ISH. IDH: isolated diastolic hypertension. ISH: isolated systolic hypertension

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Source: PubMed

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