Characteristics of study participants.

*Hypertension defined as a systolic BP of 140 mmHg or higher, diastolic BP of 90 mmHg or higher, or the combination of self-reported high BP diagnosis and the use of anti-hypertensive medications.
**P-value obtained by t-test or χ2 –test as appropriate.

* 高血压定义为收缩压（systolic BP）≥140 mmHg、舒张压（diastolic BP）≥90 mmHg，或同时存在自我报告的高血压诊断与降压药物服用史。
** P值（P-value）通过t检验或χ²检验酌情计算得到。