[The tendency of prevalence of hypertension in two countries in Gansu province from 1990 to 2012].
OBJECTIVE
To study the variation tendency of hypertension in two rural areas in Gansu, and provide epidemiological evidence to evaluate the hypertension of rural residents.


METHODS
Using equidistant random sampling method and cross-sectional sentinel monitoring, two remote natural villages, Yangzhuang and Xiangming, at Yellow river and Yangtze river valley were selected as hypertension monitoring site. From 1990 to 2012, clinical examination to the resident above 18 years old was carried out continuously for 23 years, 11 164 cases were included.


RESULTS
Hypertension prevalence of tested cases increased with years, Yangzhuang monitoring site increased from 6.9% (16/232) in 1990 to 36.7% (216/597) in 2012 with an increase of 29.8%, and Xiangming monitoring site increased from 3.4% (16/474) in 1995 to 20.6% (120/582) in 2011 with an increase of 17.2%. Total prevalence of Yangzhuang (24.1%, 1505/6240) was significantly higher than Xiangming (11.4%, 578/4924) (χ(2) = 277.9, P < 0.01). Total hypertension prevalence of 18 - 35 years old group was 9.9% (292/2944) in Yangzhuang and 4.2% (63/1495) in Xiangming, Yangzhuang was higher than Xiangming (χ(2) = 43.7, P < 0.01). Total hypertension prevalence of above 35 years old group was 36.8% (1213/3296) in Yangzhuang and 14.1% (515/3429) in Xiangming, Yangzhuang was higher than Xiangming (χ(2) = 417.7, P < 0.01). The growth rates of hypertension prevalence in 18 - 35 years old group of both areas (Yangzhuang: 823.5%, Xiangming: 614.3%) were higher than 35 years old group (Yangzhuang:310.5%, Xiangming: 368.0%), but the hypertension prevalence of above 35 years old group was higher than 18 - 35 years old group. Hypertension prevalence of male was 25.4% (761/2992) in Yangzhuang and 11.7% (238/2047) in Xiangming, Yangzhuang was higher than Xiangming (χ(2) = 145.8, P < 0.01), hypertension prevalence of female was 22.7% (738/3248) in Yangzhuang and 11.2% (340/2877)in Xiangming, Yangzhuang was higher than Xiangming (χ(2) = 125.1, P < 0.01). While the difference between male and female had no statistical significance in both areas.


CONCLUSIONS
Hypertension of the two monitoring points was in high epidemic trend, but with different epidemic trend. From different region and environment research to discuss the cause of hypertension can provide scientific evidence for prevention and control.
Uninfect Chronic Disease Prevention and Control Institute, Disease Prevention and Control Center of Gansu Provence, Lanzhou 730020, China.
Yong-rui
YR
Zhang
Peng-fei
PF
Ge
Yong-jian
YJ
Liao
Liu-liu
LL
Guo
Chou-ji
CJ
Zhang
Cai-xia
CX
Dong
Hao-qiang
HQ
Fan
Xin-rong
XR
Zhang
D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology* / Q000517:prevention & control*; D008297:Male; D009765:Obesity / Q000453:epidemiology; D011159:Population Surveillance; D015995:Prevalence; D012307:Risk Factors; D012424:Rural Population; D055815:Young Adult