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目的：对北京、上海等七城市３５岁以上居民１４６６６人的ＢＭＩ变化情况、ＢＭＩ对血压的影响进行随访研究。将基线ＢＭＩ按＜２０、２０～２５、＞２５ｋｇ／ｍ２分为低体重、正常体重和肥胖进行分析。结果：男、女性肥胖患病率分别是１８．３８％与２４．５３％，女性明显高于男性（Ｐ＜０．０５）；ＳＢＰ、ＤＢＰ水平和高血压患病率与ＢＭＩ呈正相关关系。３年随访期间，男女队列分别有４５．３０％和４５．４８％的人ＢＭＩ升高，男性ＢＭＩ升高了０．２１ｋｇ／ｍ２，女性升高了０．３１ｋｇ／ｍ２，人群平均ＳＢＰ、ＤＢＰ和高血压患病率也明显上升，ＢＭＩ增高人群的平均ＳＢＰ、ＤＢＰ与高血压患病率的升高幅度明显大于ＢＭＩ恒定和ＢＭＩ下降人群（Ｐ＜０．０１）。
OBJECTIVE: To investigate the changes of BMI in 14666 residents in Beijing, Shanghai and other seven cities over the age of 35 and the impact of BMI on blood pressure. The baseline BMI by <20,20 ~ 25,> 25kg / m2 divided into low weight, normal weight and obesity for analysis. Results: The prevalence rates of obesity in males and females were 18.38% and 24.53% respectively, significantly higher in females than in males (P <0.05). The prevalence of SBP and DBP and the prevalence of hypertension were positively correlated with BMI. During the 3-year follow-up period, 45.3% and 45.48% of the cohorts of men and women had increased BMI, 0.21 kg / m 2 for men and 0.31 kg / m 2 for women, mean SBP and DBP And the prevalence of hypertension were also significantly increased. The mean SBP, DBP and the prevalence of hypertension in patients with elevated BMI were significantly higher than those with constant BMI and decreased BMI (P <0.01).