目的:产妇体重被认为影响分娩。随着肥胖和诱发率的上升,我们试图通过体重指数(BMI)类别评估引产女性的分娩时间.
方法:2005年至2010年的足月入路回顾性队列研究。BMI类别为:正常体重(NW),超重(OW),和肥胖(Ob)(18.5-24.9,25-29.9,≥30kg/m(2))。Kruskal-Wallis测试比较了中位潜在分娩(LL)长度和活跃分娩(AL)长度。卡方确定的关联。控制混杂因素的多变量逻辑回归。分析按平价分层。
结果:共分析了448个诱导物。对于无效,不同BMI类别的LL无差异(p=0.22)。然而,与NW和Obnulliparas相比,OWnulliparas的AL更长(3.2、1.7、2.0h,p=0.005)。对于多段,西北的LL最短(5.5小时,p=0.025),BMI类别之间的AL没有差异(p=0.42)。总体剖宫产率为23%,BMI类别无差异(p=0.95)。然而,Ob妇女的第一阶段剖腹产比例更高(41%),西北妇女的第二阶段剖腹产比例更高(55%),p=0.06。
结论:在不同产程和产次阶段,BMI和产程长度之间的关联不同。BMI还影响剖宫产发生的分娩阶段。
OBJECTIVE: Maternal weight is thought to impact labor. With rising rates of obesity and inductions, we sought to evaluate labor times among induced women by body mass index (BMI) category.
METHODS: Retrospective cohort study of term inductions from 2005 to 2010. BMI categories were: normal weight (NW), overweight (OW), and obese (Ob) (18.5-24.9, 25-29.9, ≥30 kg/m(2)). Kruskal-Wallis tests compared median latent labor (LL) length and active labor (AL) length. Chi-square determined associations. Multivariable logistic regression controlled for confounders. Analyses were stratified by parity.
RESULTS: A total of 448 inductions were analyzed. For nulliparas, there was no difference in LL by BMI category (p = 0.22). However, OW nulliparas had a longer AL compared to NW and Ob nulliparas (3.2, 1.7, 2.0 h, p = 0.005). For multiparas, NW had the shortest LL (5.5 h, p = 0.025) with no difference in AL among BMI categories (p = 0.42). The overall cesarean rate was 23% with no difference by BMI category (p = 0.95). However, Ob women had a greater percentage of first stage cesareans (41%) and NW had a greater percentage of second stage cesareans (55%), p = 0.06.
CONCLUSIONS: The association between BMI and labor length among inductions differs by phase of labor and parity. BMI also influences the stage of labor in which a cesarean occurs.