{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T23:00:49Z","timestamp":1777417249732,"version":"3.51.4"},"reference-count":58,"publisher":"Walter de Gruyter GmbH","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,3,26]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec id=\"j_jpm-2019-0370_s_999_w2aab3b8c24b1b7b1aab1c16b1Aa\"><jats:title>Objective<\/jats:title><jats:p>To determine the reproducibility of the mean strain value in various cervical areas and new elastographic parameters for measuring cervical stiffness evaluated by strain elastography using<jats:italic>in vivo<\/jats:italic>compression generated by internal organ movement.<\/jats:p><\/jats:sec><jats:sec id=\"j_jpm-2019-0370_s_998_w2aab3b8c24b1b7b1aab1c16b2Aa\"><jats:title>Methods<\/jats:title><jats:p>A prospective observational study (140 singleton pregnant women; 15\u201333 weeks of gestation) was performed at two tertiary centers. Cervical strain was evaluated using E-cervix\u2122 elastography. The mean strain levels of various cervical areas [internal os (IOS), external os (EOS) and endocervical area] and several new parameters [i.e. the ratio of the strain level of IOS and EOS, elasticity contrast index (ECI), and hardness ratio] were assessed twice by two independent examiners. The inter-observer and intra-observer variances were calculated using the intraclass correlation coefficient (ICC) with a 95% confidence interval (CI). Bland-Altman (B-A) analysis was also performed.<\/jats:p><\/jats:sec><jats:sec id=\"j_jpm-2019-0370_s_997_w2aab3b8c24b1b7b1aab1c16b3Aa\"><jats:title>Results<\/jats:title><jats:p>The median gestational age was 24.0 weeks, and the mean cervical length (CL) was 3.8 cm. The intra-observer and inter-observer ICCs of the mean strain levels of the specified cervical area and new elastographic parameters were statistically significant (P\u2009&lt;\u20090.001, all); the intra-observer ICC was 0.639\u20130.725, and the inter-observer ICC was 0.538\u20130.718.<\/jats:p><\/jats:sec><jats:sec id=\"j_jpm-2019-0370_s_996_w2aab3b8c24b1b7b1aab1c16b4Aa\"><jats:title>Conclusion<\/jats:title><jats:p>The reproducibility of elastographic parameter measurements using<jats:italic>in vivo<\/jats:italic>compression is improvable.<\/jats:p><\/jats:sec>","DOI":"10.1515\/jpm-2019-0370","type":"journal-article","created":{"date-parts":[[2020,2,14]],"date-time":"2020-02-14T09:01:10Z","timestamp":1581670870000},"page":"256-265","source":"Crossref","is-referenced-by-count":10,"title":["Reliability of strain elastography using in vivo compression in the assessment of the uterine cervix during pregnancy"],"prefix":"10.1515","volume":"48","author":[{"given":"Dong Wook","family":"Kwak","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, The Republic of Korea"},{"name":"Department of Obstetrics and Gynecology, Cheil General Hospital and Women\u2019s Healthcare Center, Seoul, The Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mina","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, The Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Soo-young","family":"Oh","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, The Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyun Soo","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Graduate School of Medicine, Dongguk University, Seoul, The Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sa Jin","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, The Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Moon Young","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University, 569, Nonhyon-ro, Gangnam-gu, Seoul 06135, The Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Han Sung","family":"Hwang","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Research Institute of Medical Science, Konkuk University School of Medicine, 120 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