Predicting mid-pelvic interspinous distance in women using height and pubic arch angle

Eun Duc Na, Min Jung Baek, Ji Hyun Moon, Cho Won Park, Jin Yoon, Hanna Lee, So Hyeon Park and Ji Hyon Jang

PLOS ONE, 2023, vol. 18, issue 8, 1-10

Abstract: Objective: To predict the interspinous distance (ISD) using the relationship between female height and pelvimetric measures on magnetic resonance (MR) images. Methods: We obtained measurements of the pubic arch angle (PAA), inlet-anteroposterior (AP) distance, mid-pelvis AP distance, outlet-AP distance, ISD, and ischial tuberosity distance using 710 pelvic MR images from nonpregnant reproductive-aged (21–50 years) women from January 2014 to June 2020. Patient height was also assessed from medical records. We determined the formula for predicting ISD using multiple regression analysis. Results: The mean ± standard deviation of the height, PAA, inlet-AP distance, mid-pelvis AP distance, outlet-AP distance, ISD, and ischial tuberosity distance were 160.0 ± 5.5 cm, 87.31 ± 6.6°, 129.7 ± 9.0 mm, 119.7 ± 8.5 mm, 111.71 ± 8.90 mm, 108.88 ± 8.0 mm, and 121.97 ± 11.8 mm, respectively. Two significant regression formulas for predicting ISD were identified as follows: ISD = 0.24973 × height − 0.06724 × inlet-AP distance + 0.12166 × outlet-AP distance + 0.29233 × ischial tuberosity distance + 0.32524 × PAA (P

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0289814

DOI: 10.1371/journal.pone.0289814

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