Kazuhiro Hasegawa1, Shun Hatsushikano2, Jean-Charles Le Huec3, Zeeshan Sardar4, Hee-Kit Wong5, Hwee Weng Dennis Hey5, Gabriel Liu5, Stephane Bourret3, Michael Kelly6, Hend Riahi7, Mouna Chelli-Bouaziz7, Lawrence G Lenke4. 1. Niigata Spine Surgery Center, 2-5-22 Nishi-machi, Niigata City, Japan. kazu3795jp@yahoo.co.jp. 2. Niigata Spine Surgery Center, 2-5-22 Nishi-machi, Niigata City, Japan. 3. Polyclinique Bordeaux Nord Aquitaine, Université Bordeaux, Bordeaux, France. 4. Department of Orthopedic Surgery, Columbia University Medical Center, The Spine Hospital at New York Presbyterian, NY, USA. 5. Department of Orthopedic Surgery, National University Hospital (Singapore), Singapore, Singapore. 6. Rady Children's Hospital, University of California, San Diego, 3020 Childrens Way, San Diego, CA, 92123, USA. 7. Institut Kassab D'orthopédie, Ksar Said La Manouba, Tunis, Tunisia.
Abstract
BACKGROUND: The purpose of this study was to investigate the affecting factors on pelvic incidence (PI) and to test the hypothesis that PI changes even after skeletal maturity probably due to hypermobility of the sacroiliac joint using a large international multi-center database. METHODS: A prospective and cross-sectional healthy adult volunteers, ages 18-80 years, across 5 countries were used. Radiographic measurements included standard whole body alignment parameters. Bivariate regression analyses between PI versus demographics and spino-pelvic anatomical parameters were performed. An effect of sex on pelvic anatomical parameters was also investigated. Multivariate logistic regression with a forward stepwise procedure was performed to identify the contributing factors to PI, and an appropriate model was obtained. RESULTS: PI showed a significant positive correlation with age in pooled data. Divided by sex, however, there was no correlation in men, but women showed a significant higher correlation coefficient. Pelvic thickness (PTh) had a significant negative correlation with age in pooled data. Divided by sex, no correlation was found in men, but there was a significant correlation in women with higher correlation coefficient. The stepwise multivariate analysis for the factors on PI identified four significant factors: age, sex, ethnicity, and PTh. CONCLUSIONS: PTh, sex, ethnicity, and age affected PI. There was a positive correlation between PI and age. The tendency was more significant in woman than in man. The results support the hypothesis that PI increases with aging, but the change seems to be small and needs to be verified in a longitudinal evaluation.
BACKGROUND: The purpose of this study was to investigate the affecting factors on pelvic incidence (PI) and to test the hypothesis that PI changes even after skeletal maturity probably due to hypermobility of the sacroiliac joint using a large international multi-center database. METHODS: A prospective and cross-sectional healthy adult volunteers, ages 18-80 years, across 5 countries were used. Radiographic measurements included standard whole body alignment parameters. Bivariate regression analyses between PI versus demographics and spino-pelvic anatomical parameters were performed. An effect of sex on pelvic anatomical parameters was also investigated. Multivariate logistic regression with a forward stepwise procedure was performed to identify the contributing factors to PI, and an appropriate model was obtained. RESULTS: PI showed a significant positive correlation with age in pooled data. Divided by sex, however, there was no correlation in men, but women showed a significant higher correlation coefficient. Pelvic thickness (PTh) had a significant negative correlation with age in pooled data. Divided by sex, no correlation was found in men, but there was a significant correlation in women with higher correlation coefficient. The stepwise multivariate analysis for the factors on PI identified four significant factors: age, sex, ethnicity, and PTh. CONCLUSIONS: PTh, sex, ethnicity, and age affected PI. There was a positive correlation between PI and age. The tendency was more significant in woman than in man. The results support the hypothesis that PI increases with aging, but the change seems to be small and needs to be verified in a longitudinal evaluation.
Authors: Frank Schwab; Benjamin Ungar; Benjamin Blondel; Jacob Buchowski; Jeffrey Coe; Donald Deinlein; Christopher DeWald; Hossein Mehdian; Christopher Shaffrey; Clifford Tribus; Virginie Lafage Journal: Spine (Phila Pa 1976) Date: 2012-05-20 Impact factor: 3.468
Authors: Chao Wei; Scott L Zuckerman; Meghan Cerpa; Hong Ma; Ming Yang; Suomao Yuan; Lawrence G Lenke Journal: Eur Spine J Date: 2020-11-11 Impact factor: 3.134