AimTo analyze temporal trends and regional variations in operative vaginal delivery (OVD) in Japan.MethodsUsing the National Database of Health Insurance Claims and Specific Health Checkups of Japan from 2014 to 2021, we identified the numbers of vacuum and forceps deliveries. We analyzed annual totals and proportions of OVDs and calculated the mean age of women undergoing these deliveries. We also predicted trends in OVD for the next 20 years and compared geographical differences in the proportions of forceps deliveries among OVDs.ResultsDuring the observation period, out of 7 368 814 total births, 8.4% were through OVD, including 7.6% by vacuum and 0.8% by forceps. Both delivery methods showed an increasing trend from 2014 to 2021: vacuum deliveries rose from 7.0% to 8.7%, and forceps deliveries increased from 0.6% to 1.0%. Notably, the proportion of forceps deliveries in OVD increased from 8.1% to 10.5%. The mean age was higher for forceps deliveries than vacuum deliveries. According to our predictions, vacuum deliveries may continue to increase, but forceps deliveries may stabilize. The proportion of forceps deliveries among OVDs ranged from 0% to 38% across Japanese prefectures.ConclusionsThis study shows an increase in the use of OVD in Japan from 2014 to 2021. There are large regional differences in the choice between vacuum and forceps deliveries. These findings can help us understand the practice of OVD in Japan.

中文翻译：

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日本阴道手术分娩的时间趋势和区域差异： 一项具有全国代表性的队列研究


目的分析日本手术阴道分娩 （OVD） 的时间趋势和区域差异.方法使用 2014 年至 2021 年日本国家健康保险索赔和特定健康检查数据库，我们确定了真空和产钳分娩的数量。我们分析了 OVD 的年度总数和比例，并计算了接受这些分娩的妇女的平均年龄。结果在观察期内，在 7 368 814 例分娩中，8.4% 是通过 OVD，包括 7.6% 通过真空吸引和 0.8% 通过产钳。从 2014 年到 2021 年，两种输送方式都呈增长趋势：真空输送从 7.0% 上升到 8.7%，镊子输送从 0.6% 增加到 1.0%。值得注意的是，OVD 中产钳分娩的比例从 8.1% 增加到 10.5%。产钳分娩的平均年龄高于真空分娩。根据我们的预测，真空输送可能会继续增加，但镊子输送可能会稳定下来。在日本各县，OVD 中产钳分娩的比例从 0% 到 38% 不等。结论本研究显示，从 2014 年到 2021 年，日本 OVD 的使用有所增加。在真空吸引和产钳分娩之间的选择存在很大的地区差异。这些发现可以帮助我们了解日本 OVD 的做法。