Classification of mild to moderate severity of hypertension

Primary hypertension is divided into three levels: Wang Shih, Department of Geriatrics, Shenzhen Hospital, Peking University Hypertension grade I (mild): systolic (high pressure)/diastolic (low pressure) between 140-159/90-99 mmHg Hypertension grade II (moderate): systolic (high pressure)/diastolic (low pressure) between 160-179/100-109 mmHg Hypertension grade III (severe): systolic (high pressure)/diastolic (low pressure) greater than 180/110 mmHg.