胰岛素抵抗引起的代偿性高胰岛素血症预测非糖尿病人群血压升高--170例非糖尿病成年人6年随访

目的探讨非糖尿病成年人血压升高是胰岛素抵抗本身还是其代偿性高胰岛素血症所致。方法大庆地区1986年以标准口服葡萄糖耐量实验(OGTT)检出170例(NGT107例,IGT63例)非糖尿病成年人,年龄25～74岁。初访时测定身高、体重、血压、血糖、血浆胰岛素并全部跟踪随访至1992年,重复监测胰岛素以外各项指标。随访中恶化为糖尿病者被排除在本分析之外。计算OGTT曲线下胰岛素面积INSAUC,胰岛素敏感性指数IAI=1/(FPG×FINS)。以方差检验、相关分析及多因素线性回归分析探讨基线胰岛素敏感性、血浆胰岛素曲线下面积是否能预测随访6年后血压水平升高。结果在基线OGTT胰岛素曲线下面积四分变量组(Quartiles)中,随访6年后的SBP、DBP水平随基线INSAUC增大而升高,在INSAUC值为58.5、121.0、175.6及291.6mu/L时,SBP分别为(119.5±2.3)、(122.1±2.5)、(129.4±2.4)及(128.3±2.6)mmHg,DBP分别为(78.6±1.6)、(79.7±1.7)、(85.2±1.7)及(84.0±1.8)mmHg。多因素线性回归分析结果显示,基线值年龄、SBP与6年后之SBP水平呈显著正相关(P=0.04～0.0001),2h血糖水平与SBP相关性不显著。除此之外,基线INSAUC与随访之SBP显著独立相关基线胰岛素敏感性指数与6年后SBP相关不显著。以DBP代替SBP做因变量分析结果相似。结论在非糖尿病成

Compensated hyperinsulinemia based on selective insulin resistance predicts elevation of blood pressure in non-diabetic adults

OBJECTIVES: To investigate if hyperinsulinemia or insulin resistance could predict the elevation of blood pressure in non-diabetic adults. METHODS: One hundred and seventy non-diabetic adults (NGT 107, IGT 63) were included based on the screen by OGTT in 1986. Height, weight, blood pressure were measured. Plasma glucose and insulin concentration at 0.60 and 120 min during OGTT were determined at baseline. All the subjects were followed for six years with blood pressure and plasma glucose examined at the end of the study. Subjects worsening to diabetes were excluded. Insulin area under-curve (INSAUC) and insulin sensitivity index IAI = (1/FINS x FPG)] were calculated. Stepwise regression analysis was performed to evaluate the effects of INSAUC and insulin sensitivity to the elevation of blood pressure. RESULTS: Both SBP and DBP levels at the end of the study were increased with increased INSAUC baseline. The SBP were (119.5 +/- 2.3), (122.1 +/- 2.5), (129.4 +/- 2.4) and (128.3 +/- 2.6) mmHg, and the DBP were (78.6 +/- 1.6), (79.7 +/- 1.7), (85.2 +/- 1.4) and (84.0 +/- 1.0) mmHg from the lowest to the highest quartiles of INSAUC respectively. Pearson correlation analysis showed Age, SBP, DBP, BMI, FINS, INS1h, INSAUC at baseline were positively correlated to blood pressure levels at the end of the study. After the adjustment of Age, sex, BMI, smoking, PG2 h and blood pressure at baseline, the INSAUC was significantly correlated to blood pressure six years later, while the insulin sensitivity index was not. CONCLUSION: The compensated hyperinsulinemia based on selective insulin resistance rather than insulin resistance to glucose per se could predict the elevation of blood pressure in nondiabetic adults.