Sueyoshi T, Ritter MA, Davis KE, Loder RT. Seasonal variation in adult hip disease secondary to osteoarthritis and developmental dysplasia of the hip. World J Orthop 2016; 7(12): 821-825 [PMID: 28032035 DOI: 10.5312/wjo.v7.i12.821]
Corresponding Author of This Article
Merrill A Ritter, MD, Center for Hip and Knee Surgery, 1199 Hadley Road, Mooresville, IN 46158, United States. jrsiresearch1@gmail.com
Research Domain of This Article
Orthopedics
Article-Type of This Article
Retrospective Study
Open-Access Policy of This Article
This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
World J Orthop. Dec 18, 2016; 7(12): 821-825 Published online Dec 18, 2016. doi: 10.5312/wjo.v7.i12.821
Seasonal variation in adult hip disease secondary to osteoarthritis and developmental dysplasia of the hip
Tatsuya Sueyoshi, Merrill A Ritter, Kenneth E Davis, Randall T Loder
Tatsuya Sueyoshi, Department of Orthopedic Surgery, Kyoto University, Kyoto 606-8507, Japan
Merrill A Ritter, Kenneth E Davis, Center for Hip and Knee Surgery, Mooresville, IN 46158, United States
Randall T Loder, James Whitcomb Riley Children’s Hospital, Indianapolis, IN 46202, United States
Author contributions: Sueyoshi T primary contributed to the work and wrote the manuscript; Ritter MA did the surgery and organized the study; Davis KE did the data collection and statistics; Loder RT made some of developmental dysplasia of the hip comments and gave suggestion.
Institutional review board statement: The study was reviewed and approved by the St. Francis Hospital Institutional Review Board.
Informed consent statement: All study participants or their legal guardian provided consent about personal and medical data collection prior to study enrolment.
Conflict-of-interest statement: All the Authors have no conflict of interest related to the manuscript.
Data sharing statement: The original anonymous dataset is available on request from the corresponding author at jrsiresearch1@gmail.com.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Merrill A Ritter, MD, Center for Hip and Knee Surgery, 1199 Hadley Road, Mooresville, IN 46158, United States. jrsiresearch1@gmail.com
Telephone: +1-317-8345263
Received: January 12, 2016 Peer-review started: January 14, 2016 First decision: March 7, 2016 Revised: August 8, 2016 Accepted: August 17, 2016 Article in press: August 18, 2016 Published online: December 18, 2016
Abstract
AIM
To determine if there was a seasonal variation in adults undergoing total hip arthroplasty for end stage hip disease due to osteoarthritis (OA) or sequelae of developmental dysplasia of the hip (DDH).
METHODS
The total hip registry from the author’s institution for the years 1969 to 2013 was reviewed. The month of birth, age, gender, and ethnicity was recorded. Differences between number of births observed and expected in the winter months (October through February) and non-winter mo (March through September) were analyzed with the χ2 test. Detailed temporal variation was mathematically assessed using cosinor analysis.
RESULTS
There were 7792 OA patients and 60 DDH patients who underwent total hip arthroplasty. There were more births than expected in the winter months for both the DDH (P < 0.0001) and OA (P = 0.0052) groups. Cosinor analyses demonstrated a peak date of birth on 1st October.
CONCLUSION
These data demonstrate an increased prevalence of DDH and OA in those patients born in winter.
Core tip: The purpose of this study was to determine if there was a seasonal variation undergoing total hip arthroplasty for osteoarthritis (OA) or developmental dysplasia of the hip (DDH). Differences between number of births observed and expected in the winter months and non-winter months were analyzed with the χ2 test. There were 7792 OA and 60 DDH, and more births than expected in the winter months for both the DDH (P < 0.0001) and the OA (P = 0.0052) cohorts. These data clearly demonstrated an increased prevalence of DDH and OA in those patients born during the winter months.
