Table 2

Inclusion/exclusion criteria for hypertension participants

Inclusion criteriaExclusion criteria
  1. Local resident for more than 5 years

  2. Age 35–70 years

  3. Han nationality

  4. Independent individuals

  5. Early stage of essential hypertension, 160 mm Hg>SBP≥140 mm Hg and (or) 100 mm Hg>DBP≥90 mm Hg, according to the definition standard of the 2010 Chinese hypertension guidelines

  6. No secondary hypertension

  7. Willingness to volunteer to participate in the trial and sign the informed consent form

  1. Patients with secondary stage and above hypertension (SBP >160 mm Hg and (or) DBP >100 mm Hg)

  2. Use of any antihypertensive drugs in the previous 1 month

  3. Clinical diagnosis of cardiovascular disease, kidney disease, liver disease or malignant tumour

  4. Pregnant women

  5. Self-adherence to a low-sodium diet

  6. Inability or unwillingness to participate in the study or sign the informed consent form

  • DBP, diastolic blood pressure; SBP, systolic blood pressure.