Abstract：
UNASSIGNED: While a basic understanding of pelvic size and typology is still important for obstetricians, pelvic measurement data for Japanese women are very scarce. To our best knowledge, no large-scale pelvimetry studies of Japanese women have been made for the past 50 years. This study aimed to investigate the accurate size, particularly the obstetric conjugate (OC) and transverse diameter of the pelvic inlet (TD), of modern Japanese women, using three-dimensional (3D) computed tomography (CT), and to obtain their reference values.
UNASSIGNED: This retrospective, single-center observational study enrolled Japanese non-pregnant women aged between 20 and 40 years, who underwent pelvic CT examination from 2016 to 2021. CT was performed for various reasons, including acute abdomen, search for cancer metastases, and follow-up of existing disease. However, no cases were taken for pelvic measurements. Pelvimetry was performed retrospectively using a 3D workstation. The OC was measured on a strict lateral view and the TD was measured on an axial-oblique view. Other clinical data, such as age, height, and weight, were also extracted from the medical charts and analyzed.
UNASSIGNED: A total of 1,263 patients were enrolled, with the mean age of 32.7 years (standard deviation [SD] 6.2). The mean height, weight, and body mass index were 158.8 cm (SD 5.8), 54.8 kg (SD 11.7), and 21.7 kg/m2 (SD 4.4), respectively. The mean OC length was 127.0 mm (SD 9.5, 95% confidence interval [CI] 126.5-127.5), while the mean TD length was 126.8 mm (SD 7.5, 95% CI 126.4-127.2). Both values were normally distributed. Height was significantly associated with OC (regression coefficient = 0.75 [95% CI 0.66-0.84], p < .001) and TD (regression coefficient = 0.63 [95% CI 0.56-0.70], p < .001). Age showed a weak but statistically significant positive association with TD (regression coefficient = 0.14 [95% CI 0.07-0.20], p < .001) and OC (regression coefficient = -0.10 [95% CI -0.18 to -0.01], p = .026).
UNASSIGNED: The 3D CT pelvimetry in 1,263 non-pregnant Japanese women of childbearing age revealed the mean OC and TD of 127.0 mm, and 126.8 mm, which were 11.8 mm and 4.3 mm larger, respectively, than those in the survey in 1972. Our data will be referred to in clinical practice as the standard pelvic measurement values for the Japanese population.
UNASSIGNED: This retrospective, single-center observational study enrolled Japanese non-pregnant women aged between 20 and 40 years, who underwent pelvic CT examination from 2016 to 2021. CT was performed for various reasons, including acute abdomen, search for cancer metastases, and follow-up of existing disease. However, no cases were taken for pelvic measurements. Pelvimetry was performed retrospectively using a 3D workstation. The OC was measured on a strict lateral view and the TD was measured on an axial-oblique view. Other clinical data, such as age, height, and weight, were also extracted from the medical charts and analyzed.
UNASSIGNED: A total of 1,263 patients were enrolled, with the mean age of 32.7 years (standard deviation [SD] 6.2). The mean height, weight, and body mass index were 158.8 cm (SD 5.8), 54.8 kg (SD 11.7), and 21.7 kg/m2 (SD 4.4), respectively. The mean OC length was 127.0 mm (SD 9.5, 95% confidence interval [CI] 126.5-127.5), while the mean TD length was 126.8 mm (SD 7.5, 95% CI 126.4-127.2). Both values were normally distributed. Height was significantly associated with OC (regression coefficient = 0.75 [95% CI 0.66-0.84], p < .001) and TD (regression coefficient = 0.63 [95% CI 0.56-0.70], p < .001). Age showed a weak but statistically significant positive association with TD (regression coefficient = 0.14 [95% CI 0.07-0.20], p < .001) and OC (regression coefficient = -0.10 [95% CI -0.18 to -0.01], p = .026).
UNASSIGNED: The 3D CT pelvimetry in 1,263 non-pregnant Japanese women of childbearing age revealed the mean OC and TD of 127.0 mm, and 126.8 mm, which were 11.8 mm and 4.3 mm larger, respectively, than those in the survey in 1972. Our data will be referred to in clinical practice as the standard pelvic measurement values for the Japanese population.
摘要：
UNASSIGNED：虽然对骨盆大小和类型的基本了解对于产科医生仍然很重要，日本女性的骨盆测量数据非常稀缺。据我们所知，在过去的50年里，没有对日本女性进行大规模的骨盆测量研究。这项研究旨在调查准确的大小，特别是产科共轭（OC）和骨盆入口（TD）的横向直径，现代日本女性，使用三维（3D）计算机断层扫描（CT），并获得其参考值。
未经评估：本次回顾，单中心观察性研究招募了年龄在20至40岁之间的日本非孕妇，从2016年到2021年接受了骨盆CT检查。由于各种原因进行了CT检查，包括急腹症,寻找癌症转移，以及现有疾病的随访。然而,没有病例进行盆腔测量。使用3D工作站进行回顾性测量。在严格的侧视图上测量OC,并且在轴向斜视图上测量TD。其他临床资料,比如年龄,高度,和体重,也从医学图表中提取和分析。
未经评估：共纳入1,263名患者，平均年龄为32.7岁(标准差[SD]6.2)。平均身高,体重,体重指数为158.8cm（SD5.8），54.8千克（标的值11.7），和21.7kg/m2（SD4.4），分别。平均OC长度为127.0mm（SD9.5，95％置信区间[CI]126.5-127.5），而平均TD长度为126.8mm（SD7.5，95%CI126.4-127.2）。两个值都是正态分布的。身高与OC显著相关(回归系数=0.75[95%CI0.66-0.84]，p<.001)和TD(回归系数=0.63[95%CI0.56-0.70]，p<.001)。年龄与TD呈微弱但有统计学意义的正相关(回归系数=0.14[95%CI0.07-0.20],p<.001)和OC(回归系数=-0.10[95%CI-0.18至-0.01]，p=.026）。
UNASSIGNED：1,263名未怀孕的日本育龄妇女的3DCT骨盆测量显示，平均OC和TD为127.0mm，126.8毫米，大11.8毫米和4.3毫米，分别,比1972年的调查还要多。我们的数据将在临床实践中被称为日本人群的标准骨盆测量值。
未经评估：本次回顾，单中心观察性研究招募了年龄在20至40岁之间的日本非孕妇，从2016年到2021年接受了骨盆CT检查。由于各种原因进行了CT检查，包括急腹症,寻找癌症转移，以及现有疾病的随访。然而,没有病例进行盆腔测量。使用3D工作站进行回顾性测量。在严格的侧视图上测量OC,并且在轴向斜视图上测量TD。其他临床资料,比如年龄,高度,和体重,也从医学图表中提取和分析。
未经评估：共纳入1,263名患者，平均年龄为32.7岁(标准差[SD]6.2)。平均身高,体重,体重指数为158.8cm（SD5.8），54.8千克（标的值11.7），和21.7kg/m2（SD4.4），分别。平均OC长度为127.0mm（SD9.5，95％置信区间[CI]126.5-127.5），而平均TD长度为126.8mm（SD7.5，95%CI126.4-127.2）。两个值都是正态分布的。身高与OC显著相关(回归系数=0.75[95%CI0.66-0.84]，p<.001)和TD(回归系数=0.63[95%CI0.56-0.70]，p<.001)。年龄与TD呈微弱但有统计学意义的正相关(回归系数=0.14[95%CI0.07-0.20],p<.001)和OC(回归系数=-0.10[95%CI-0.18至-0.01]，p=.026）。
UNASSIGNED：1,263名未怀孕的日本育龄妇女的3DCT骨盆测量显示，平均OC和TD为127.0mm，126.8毫米，大11.8毫米和4.3毫米，分别,比1972年的调查还要多。我们的数据将在临床实践中被称为日本人群的标准骨盆测量值。
