孕前体重指数异常与孕期高血脂水平的交互作用对妊娠期糖尿病发病的影响

目的 探讨孕前体重指数(pBMI)异常与孕期高血脂水平之间的交互作用对妊娠期糖尿病(GDM)发病的影响。方法 选取2017年3月至2018年7月于杭州市妇产科医院规律产检、孕前无血脂相关疾病并确诊为GDM的235例患者为GDM组,按照年龄采用1∶3个体匹配的方法纳入同期在杭州市妇产科医院产检的705名孕期糖耐量正常(NGT)的孕妇为对照组。采用广义多因子降维法(GMDR)对pBMI-血脂与GDM之间可能存在的交互作用进行探索,计算交叉验证一致性、均衡检验准确性及P值,以评估每个模型的交互作用。结果 GMDR模型分析表明,包含pBMI与孕期血脂两个因素的二阶模型为最佳模型(P=0.001),交叉验证一致性为10/10,均衡检验准确性为64.48%。校正混杂因素后发现,超重/肥胖合并高三酰甘油(TG)者的GDM发病风险最高(OR=14.349,95%CI=6.449~31.924,P<0.001)。分层分析结果显示,高TG水平组中超重/肥胖者比正常体重者的发病风险要高(OR=2.243,95%CI=1.173~4.290,P=0.015)。结论 pBMI异常及孕期高血脂水平是GDM发病的危险因素,并且两者间存在交互作用,超重/肥胖且高TG水平的孕妇更容易患GDM。

Interaction between Abnormal Prepregnancy Body Mass Index and Hyperlipidemia during Pregnancy on the Risk of Gestational Diabetes Mellitus

Objective To explore the interaction between abnormal prepregnancy body mass index(pBMI)and high blood lipid level during pregnancy on the risk of gestational diabetes mellitus(GDM). Methods A total of 235 patients with GDM and no blood lipid-related diseases before pregnancy were selected from Hangzhou Women's Hospital during March 2017 to July 2018 as the GDM group.At a ratio of 1∶3,a total of 705 individual age-matched pregnant women with normal glucose metabolism during prenatal examination from the same hospital were selected as the control group.The generalized multifactor dimension reduction(GMDR)method was employed to characterize the possible interaction between pBMI-blood lipid and GDM.The cross-validation consistency,equilibrium test accuracy,and P value were calculated to evaluate the interaction of each model. Results GMDR model analysis showed that the second-order model including pBMI and gestational blood lipid level had the best performance(P=0.001),with the cross-validation consistency of 10/10 and the equilibrium test accuracy of 64.48%,suggesting that there was a potential interaction between pBMI and gestational high blood lipid level.After adjustment of confounding factors,the model demonstrated that overweight/obesity patients with high triglyceride(TG) level had the highest risk of developing GDM(OR=14.349,95%CI=6.449-31.924,P<0.001).Stratified analysis showed that overweight/obesity patients under high TG level group had a higher risk of developing GDM than normal weight individuals(OR=2.243,95%CI=1.173-4.290,P=0.015). Conclusions Abnormal pBMI and high blood lipid level during pregnancy are the risk factors of GDM and have an interaction between each other.Overweight/obese pregnant women with high TG levels are more likely to develop GDM.