The Science of Variation Group is a collaborative effort to improve the study of variation in interpretation and classification of injuries. Through this website we are able to study observer variation among a large number of fully trained, practicing and experienced surgeons. All participation is voluntary and recognized by Acknowledgement.  Authorship of publications is decided prior to initiation of the study and is based on involvement in study design, set-up, execution, data analysis, and writing of the paper.  Interested surgeons from any part of the world are encouraged to join and to bring their ideas to the group. If you know a colleague that might like to join the Science of Variation Group, please forward this message or send them to the link to join!

New SOVG Study is editor's choice in this month's JHS

posted Aug 18, 2017, 2:26 PM by Thierry Guitton   [ updated Aug 18, 2017, 2:29 PM ]

What does your implant cost? 

Another SOVG study is editor's choice in this month's JHS edition! Excellent achievement of the collaboration!

Surgical costs are under scrutiny and surgeons are being held increasingly responsible for cost containment. In some instances, implants are the largest component of total procedure cost, yet previous studies reveal that surgeons’ knowledge of implant prices is poor.


6 Years of Science of Variation Group: Holiday Inter Observer Participation Invitation

posted Dec 23, 2016, 12:53 AM by Thierry Guitton   [ updated Dec 23, 2016, 12:55 AM ]

We would like to take this opportunity to thank you for your collaboration in 2016! It is now 6 years since the start of the Science of Variation Group! Please find below (y)our Scientific Output of 2016! It's an honor and greatest pleasure to share this incredible moment with you again this year. We are thankful for the enthusiasm, effort and hard work that continuously is being put into it by everyone involved in the Science of Variation Group and our specialty chapters!

Last year we first introduced the “Holiday Edition” online study! Again to celebrate this years incredible accomplishment we would like to invite you to second “Holiday Edition” online study. Please share your knowledge on orthopedic, trauma and hand surgery!

We invite members of the collaborative to use this platform for their own studies. We are here to help! As always, all members of the collaborative that participate will be credited on the study by group authorship/acknowledgment.

We wish you happy holidays and please enjoy the very last study of 2016 at the fireside and we are excited and looking forward to future projects!

Please click the link below to start the new study!

[SurveyLink]

Thierry Guitton
David Ring

On behalf of all authors:  Specialty chapters as part of the Science of Variation Group: Shoulder & Elbow Study Collaborative, Ankleplatform Study Collaborative and Traumaplatform

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Published Scientific Yearly Output Science of Variation Group 2016:

Including Specialty chapters as part of the Science of Variation Group: Shoulder & Elbow Study Collaborative, Ankleplatform Study Collaborative and Traumaplatform.

Mellema JJ, Kuntz MT, Guitton TG, Ring D. The Effect of Two Factors on Interobserver Reliability for Proximal Humeral Fractures. J Am Acad Orthop Surg.  2017 Jan;25(1):69-76. doi: 10.5435/JAAOS-D-16-00223. PubMed PMID: 27906770.

2.      Hageman MG, Döring AC, Spit SA, Guitton TG, Ring D. Assessment of Decisional Conflict about the Treatment of Trigger Finger, Comparing Patients and Physicians. Arch Bone Jt Surg. 2016 Oct;4(4):353-358. PubMed PMID: 27847849; PubMed Central PMCID: PMC5100452.

3.      Claessen FM, Stoop N, Doornberg JN, Guitton TG, van den Bekerom MP, Ring D; Science of Variation Group. Interpretation of Post-operative Distal Humerus Radiographs After Internal Fixation: Prediction of Later Loss of Fixation. J Hand Surg Am. 2016 Oct;41(10):e337-e341. doi: 10.1016/j.jhsa.2016.07.094. PubMed PMID: 27522299.

4.      van Wulfften Palthe OD, Neuhaus V, Janssen SJ, Guitton TG, Ring D; Science of  Variation Group. Among Musculoskeletal Surgeons, Job Dissatisfaction Is Associated With Burnout. Clin Orthop Relat Res. 2016 Aug;474(8):1857-63. doi: 10.1007/s11999-016-4848-6. PubMed PMID: 27113597; PubMed Central PMCID:PMC4925415.

5.      Mallee WH, Mellema JJ, Guitton TG, Goslings JC, Ring D, Doornberg JN; Science  of Variation Group. 6-week radiographs unsuitable for diagnosis of suspected scaphoid fractures. Arch Orthop Trauma Surg. 2016 Jun;136(6):771-8. doi: 10.1007/s00402-016-2438-4. PubMed PMID: 27026536; PubMed Central PMCID: PMC4870290.

6.      Becker SJ, Bruinsma WE, Guitton TG, van der Horst CM, Strackee SD, Ring D; Science of Variation Group. Interobserver Agreement of the Eaton-Glickel Classification for Trapeziometacarpal and Scaphotrapezial Arthrosis. J Hand Surg  Am. 2016 Apr;41(4):532-540.e1. doi: 10.1016/j.jhsa.2015.12.028. PubMed PMID: 26826947.

7.      Janssen SJ, Hermanussen HH, Guitton TG, van den Bekerom MP, van Deurzen DF, Ring D. Greater Tuberosity Fractures: Does Fracture Assessment and Treatment Recommendation Vary Based on Imaging Modality? Clin Orthop Relat Res. 2016 May;474(5):1257-65. doi: 10.1007/s11999-016-4706-6. PubMed PMID: 26797912; PubMed Central PMCID: PMC4814403.

8.      Teunis T, Janssen S, Guitton TG, Ring D, Parisien R. Do Orthopaedic Surgeons  Acknowledge Uncertainty? Clin Orthop Relat Res. 2016 Jun;474(6):1360-9. doi: 10.1007/s11999-015-4623-0.

9.      Bernstein DN, Sood A, Mellema JJ, Li Y, Ring D. Lifetime prevalence of and factors associated with non-traumatic musculoskeletal pains amongst surgeons and  patients. Int Orthop. 2016 Nov 18. [Epub ahead of print] PubMed PMID: 27864586.

10.  Hageman MG, Bossen JK, Neuhaus V, Mudgal CS, Ring D; Science of Variation Group. Assessment of Decisional Conflict about the Treatment of carpal tunnel syndrome, Comparing Patients and Physicians. Arch Bone Jt Surg. 2016 Apr;4(2):150-5. PubMed PMID: 27200394; PubMed Central PMCID: PMC4852042.

11.  Mellema JJ, Doornberg JN, Molenaars RJ, Ring D, Kloen P; Traumaplatform Study  Collaborative & Science of Variation Group. Interobserver reliability of the Schatzker and Luo classification systems for tibial plateau fractures. Injury. 2016 Apr;47(4):944-9. doi: 10.1016/j.injury.2015.12.022. PubMed PMID: 26777468.

12.  Mellema JJ, Doornberg JN, Molenaars RJ, Ring D, Kloen P; Traumaplatform Study  Collaborative & Science of Variation Group. Tibial Plateau Fracture Characteristics: Reliability and Diagnostic Accuracy. J Orthop Trauma. 2016 May;30(5):e144-51. doi: 10.1097/BOT.0000000000000511. PubMed PMID: 27101164.

13.  Meijer DT, de Muinck Keizer RJ, Doornberg JN, Sierevelt IN, Stufkens SA, Kerkhoffs GM, van Dijk CN; Ankle Platform Study Collaborative—Science of Variation Group. Diagnostic Accuracy of 2-Dimensional Computed Tomography for Articular Involvement and Fracture Pattern of Posterior Malleolar Fractures. Foot Ankle Int. 2016 Jan;37(1):75-82. doi: 10.1177/1071100715603999. PubMed PMID: 26420736.

14.  Claessen FM, Meijer DT, van den Bekerom MP, Gevers Deynoot BD, Mallee WH, Doornberg JN, van Dijk CN. Reliability of classification for post-traumatic ankle osteoarthritis. Knee Surg Sports Traumatol Arthrosc. 2016 Apr;24(4):1332-7. doi:  10.1007/s00167-015-3871-6.

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SOVG Podium Presentation @ NVPC 2015

posted Sep 8, 2015, 3:30 PM by Thierry Guitton   [ updated Sep 8, 2015, 3:34 PM ]


SESSIE 3 | HANDCHIRURGIE 
11.00 uur; S.J.E. Becker | Amsterdam | Variabiliteit in behandeling van trapeziometacarpale artrose tussen chirurgen

We congratulate Stephanie Becker one of the SOVG PHD research fellows who will present unpublished SOVG work at the Dutch Society of Plastic Surgery on october 3rd 2015 in Amsterdam. 

New SOVG Study

posted Sep 8, 2015, 3:22 PM by Thierry Guitton   [ updated Sep 8, 2015, 3:24 PM ]

We are happy to invite you to a new Science of Variation Group study! This study will evaluate the lifetime prevalence of pains of more than a month duration at various anatomical sites. All members of the collaborative that participate will be credited on the study by acknowledgement.

Please click your personal link to start the new study!

Feel free to email with questions.

Thierry Guitton
guitton@gmail.com

David Ring, MD PhD
dring@partners.org

New SOVG Study Started Today

posted Jul 8, 2015, 3:07 PM by Thierry Guitton   [ updated Jul 8, 2015, 3:08 PM ]

We are pleased to invite you to the next Science of Variation Group Study. This study will assess the displacement and surgical decision making of greater tuberosity fractures. 

Please click the link in your email invitation to start the new study!

Thank you in advance for all your time and effort!

-The SOVG Research Team

New SOVG study started

posted Jun 4, 2015, 5:32 AM by Thierry Guitton   [ updated Jun 4, 2015, 5:35 AM ]

Today we will start two new SOVG studies! For hand and upper-extremity surgeons the study will evaluate the reliability of staging osteoarthritis using the SNAC classification in wrists with a scaphoid nonunion. All members of the collaborative that participate will be credited by acknowledgement on the study. For trauma and lower extremity surgeons a study on trachanteric fractures and there treatment wil be started! 

Please check your email link and start the study!

New Paper Published!

posted Jun 4, 2015, 5:29 AM by Thierry Guitton   [ updated Jun 4, 2015, 5:29 AM ]

Osteochondritis dissecans of the humeral capitellum: reliability of four classification systems using radiographs and computed tomography  A new SOVG paper has been published online in CORR! This paper is titled: "Do Surgeons Treat Their Patients Like They Would Treat Themselves". We conclude: Surgeons are slightly more likely to recommend surgery for a patient than they are to choose surgery for themselves and they choose for themselves with a little more confidence.

New SOVG Paper Published Online

posted May 9, 2015, 5:53 AM by Thierry Guitton   [ updated May 9, 2015, 9:39 AM ]

Osteochondritis dissecans of the humeral capitellum: reliability of four classification systems using radiographs and computed tomography
T
he SOVG and Shoulder and Elbow colloborative study on The radiographic appearance of osteochondritis dissecans (OCD) of the humeral capitellum has been published online at Journal of shoulder elbow surgery.  Read More

Next Science of Variation Group study Started

posted May 4, 2015, 1:27 AM by Thierry Guitton   [ updated May 9, 2015, 9:32 AM ]

We are happy to invite you to the next Science of Variation Group study! 
This study will evaluate factors that influence surgeons implant choices. All members of the collaborative that participate will be credited by acknowledgement on the study. 

Please click the link in your invitation email to start the new study!


Letter to the Editor Published

posted Apr 24, 2015, 12:51 AM by Thierry Guitton   [ updated May 9, 2015, 9:33 AM ]

The Science of Variation Group recently published an article about the (common)sense on biomechanical studies which was published in Injury recently. Zadpoor and Valstar commented on this in their letter to the editor. You can find their response by clicking here

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