Definition of terms

A simplified Chinese version of the Generalised Anxiety Disorder Scale (GAD-7) was used to screen for anxiety symptoms. GAD-7 has been found to be a reliable and valid measurement of anxiety severity⁽²⁴⁾. Participants with scores 5–9 and ≥10 were considered to have mild and moderate to severe anxiety symptoms, respectively. Hypertension was defined as systolic blood pressure ≥140 mm Hg or diastolic blood pressure ≥90 mmHg, or having received antihypertensive therapy⁽²⁵⁾. Obesity was defined by BMI ≥28 kg/m²⁽¹³⁾.