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Are published characteristics of the ambulatory blood pressure generalizable to rural Chinese? The Jingning population study

2005; Oxford University Press; Volume: 18; Issue: 5 Linguagem: Inglês

10.1016/j.amjhyper.2005.03.098

1941-7225

Yong Li, J WANG, Ping Gao, Hai Guo, Tim S. Nawrot, G WANG, Ying Qian, Jan A. Staessen, Dingliang Zhu,

Sodium Intake and Health

We investigated the ambulatory blood pressure in rural Chinese and compared its characteristics with those reported in other population-based studies. We enrolled inhabitants from 6 villages of the JingNing County, China. We recorded the ambulatory blood pressure with 90207 SpaceLabs monitors. Trained observers measured the conventional blood pressure at the participants' homes. The 356 participants (12–86 years) included 192 (53.9%) women and 117 (32.9%) hypertensive patients. In all participants, systolic/diastolic blood pressure averaged 129/80 mm Hg at home. The ambulatory blood pressure means were 121/77 mm Hg over 24 hours, 126/81 mm Hg during daytime (0800 to 1800 h) and 112/70 mm Hg during night-time (2200 to 0400 h). The awake and asleep blood pressures averaged 126/82 mm Hg and 112/70 mm Hg, respectively. Using previously published definitions of daytime (1000 to 2000 h) and night-time (midnight to 0600 h) instead of those given above, increased the blood pressure differences with the awake and asleep blood pressures from 0.4/0.2 mm Hg to 1.2/1.0 mm Hg and from 0.3/0 mm Hg to 1.4/1.6 mm Hg, respectively. Using MEDLINE, we searched for population-based studies on ambulatory blood pressure monitoring. In our normotensive subjects, the whole-day and night-time diastolic blood pressures were from 1 to 4 mm Hg and from 3 to 7 mm Hg higher than in 5 other population studies in Caucasians or Japanese, whereas night-time blood pressure in our participants was 9/5 mm Hg lower than in Chinese living in Taiwan. We demonstrated significant differences in the characteristics of the ambulatory blood pressure across Asian and Caucasian populations. To what extent different activity patterns, genetic and/or environmental factors explain these ethnic diversity remains to be clarified.