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Table 2 Percentage (%) distribution of blood pressure levels in a rural population of Yi ethnic group in southwest China, 2012

From: Prevalence, awareness, medication, control, and risk factors associated with hypertension in Yi ethnic group aged 50 years and over in rural China: the Yunnan minority eye study

   Normotensive or controlled hypertensive Hypertensive*
Age group (yrs) n Optimal Normal High normal Stage 1 Stage 2 Stage 3
SBP   <120 120-129 130-139 140-159 160-179 ≥180
DBP   <80 80-84 85-89 90-99 100-109 ≥110
Male (total) 950 20.2 19.6 22.5. 18.7 11.2 7.8
50-59 266 25.6 24.2 17.1 16.4 10.2 6.5
60-69 362 24.1. 18.9 23.4 17.2 10.8 7.6
70-79 243 13.5 16.3 26.6 20.4 13.8 9.4
80- 79 20.3 18.6 18.1 20.2 14.6 8.2
Female (total) 1258 23.7 17.2 20.0 19.6 11.1 8.6
50-59 393 27.2 25.4 15.1 16.6 10.4 5.3
60-69 458 20.6 18.8 21.3 18.9 11.2 9.2
70-79 332 15.5. 17.2 24.5 20.1 12.7 10.0
80- 75 18.9 12.7 16.4 25.4 17.2 9.4
  1. *For hypertensive, stage 1 refers to SBP between 140 and 159 mmHg, DBP between 90 and 99 mmHg; stage 2 refers to SBP between 160 and 179 mmHg, DBP between 100 and109 mmHg; and stage 3 refers to SBP ≥ 180 mmHg, DBP ≥ 110 mmHg.