Hypertension is a major risk factor for cardiovascular and cerebrovascular diseases, and a relationship between altitude and hypertension has been demonstrated. To better characterise this relationship, this study investigated the prevalence of hypertension and its association with altitude in community-dwelling older adults living at different altitudes in Xinjiang, northwest China.

A cross-sectional study.

Xinjiang, China.

50 778 community-dwelling older adults residing at varying altitudes across Xinjiang.

A multistage stratified sampling method was used to conduct an epidemiological survey from January 2019 to December 2019 among 50 778 community-dwelling older adults aged ≥60 years who were long-term residents of Kashgar (1289 m), Hami (738 m) and Turpan (35 m), Xinjiang. Logistic regression analysis was conducted to evaluate the association between altitude and hypertension risk.

Mean systolic blood pressure (SBP) and diastolic blood pressure (DBP) showed significant variations (both p

In community-dwelling older adults residing in lowland to mid-elevation zones (35–1289 m) of Xinjiang, the prevalence and risk of hypertension were found to be inversely associated with residential altitude. These findings may reflect an environmental gradient effect specific to mid-to-low altitude settings, and their generalisability may be limited to populations at higher altitudes (>1500 m) or regions with distinct ethnic, genetic or healthcare backgrounds. Furthermore, it should be emphasised that this association likely reflects altitude-related environmental factors rather than direct physiological effects of hypoxia. Additional studies are warranted to further elucidate these complex relationships.