Kerry Sally M, Micah Frank B, Plange-Rhule Jacob, Eastwood John B, Cappuccio Francesco P
Department of Community Health Sciences, St George's, University of London, UK.
J Hypertens. 2005 Sep;23(9):1645-51. doi: 10.1097/01.hjh.0000177536.53409.1a.
Blood pressure (BP) is positively related to body mass index (BMI) in persons of both Caucasian and African origin, but the precise nature of the relationship is unclear.
To study the relationship between BP and BMI in a lean African population.
A community-based cross-sectional study.
The BMI and BP were measured in 362 men and 592 women aged 40-75 years living in Ashanti, Ghana. In total, 498 lived in semi-urban areas and 456 in rural villages.
The BMI was higher among semi-urban women [23.1 kg/m (95% confidence interval (CI), 22.5 to 23.6)] than semi-urban men [20.9 kg/m (95% CI, 20.6 to 21.5)], rural men [19.5 kg/m (95% CI, 19.1 to 19.9)] and rural women [19.9 kg/m (95% CI, 19.5 to 20.3)]. For systolic BP in women older than 52 years and in semi-urban women, the relationship was non-linear. The slope of the line below the change point ("knot") was greater than that above it. There was no evidence of non-linearity in men. For diastolic BP only younger women had a significant "knot" point at 18 kg/m. Again, the slope of the line below the "knot" was greater than that above it. In men, however, there was also evidence of a "knot" in younger and rural men, with the slope of the line below the "knot" being less that that above it (unlike in women).
The relationship between BP and BMI is not linear, and is possibly sigmoid, but this may vary between subgroups.
在白种人和非洲裔人群中，血压（BP）与体重指数（BMI）呈正相关，但这种关系的确切性质尚不清楚。
研究瘦型非洲人群中血压与BMI之间的关系。
一项基于社区的横断面研究。
对居住在加纳阿散蒂地区的362名40至75岁男性和592名40至75岁女性测量BMI和血压。其中，498人生活在半城市地区，456人生活在农村。
半城市女性的BMI[23.1kg/m²（95%置信区间（CI），22.5至23.6）]高于半城市男性[20.9kg/m²（95%CI，20.6至21.5）]、农村男性[19.5kg/m²（95%CI，19.1至19.9）]和农村女性[19.9kg/m²（95%CI，19.5至20.3）]。对于52岁以上女性和半城市女性的收缩压，这种关系是非线性的。变化点（“节点”）以下直线的斜率大于其上方直线的斜率。男性中没有非线性的证据。对于舒张压，只有年轻女性在BMI为18kg/m²时有一个显著的“节点”点。同样，“节点”以下直线的斜率大于其上方直线的斜率。然而，在男性中，年轻男性和农村男性也有“节点”的证据，“节点”以下直线的斜率小于其上方直线的斜率（与女性不同）。
血压与BMI之间的关系不是线性的，可能是S形的，但这在不同亚组之间可能有所不同。
