Informational value and bias of videos related to orthodontics screened on a video-sharing Web site.
OBJECTIVE
To assess the informational value, intention, source, and bias of videos related to orthodontics screened by the video-sharing Internet platform YouTube.


METHODS
YouTube (www.youtube.com) was scanned in July 2010 for orthodontics-related videos using an adequately defined search term. Each of the first 30 search results of the scan was categorized with the system-generated sorts "by relevance" and "most viewed" (total: 60). These were rated independently by three assessors, who completed a questionnaire for each video. The data were analyzed statistically using Friedman's test for dependent samples, Kendall's tau, and Fleiss's kappa.


RESULTS
The YouTube scan produced 5140 results. There was a wide variety of information about orthodontics available on YouTube, and the highest proportion of videos was found to originate from orthodontic patients. These videos were also the most viewed ones. The informational content of most of the videos was generally judged to be low, with a rather poor to inadequate representation of the orthodontic profession, although a moderately pro-orthodontics stance prevailed. It was noticeable that the majority of contributions of orthodontists to YouTube constituted advertising. This tendency was not viewed positively by the majority of YouTube users, as was evident in the divergence in the proportions when sorting by "relevance" and "most viewed."


CONCLUSIONS
In the light of the very large number of people using the Internet as their primary source of information, orthodontists should recognize the importance of YouTube and similar social media Web sites in the opinion-forming process, especially in the case of adolescents.
Department of Orthodontics and Dentofacial Orthopedics, Center of Dentistry, Georg-August-University, Göttingen, Germany. mknoesel@yahoo.de
Michael
M
Knösel
Klaus
K
Jung
D000293:Adolescent; D000328:Adult; D000329:Advertising; D015982:Bias; D002648:Child; D006801:Humans; D033181:Information Dissemination; D020407:Internet; D009970:Orthodontics / Q000193:education*; D011795:Surveys and Questionnaires; D014741:Video Recording
Stud Health Technol Inform. 2009;150:292-6
19745316
Perspect Biol Med. 2008 Autumn;51(4):517-24
18997354
Appetite. 2010 Jun;54(3):591-4
20171252
Drug Alcohol Depend. 2010 Apr 1;108(1-2):138-40
20031341
Dermatol Clin. 2009 Apr;27(2):133-6, vi
19254656
Plast Reconstr Surg. 2010 Jul;126(1):51e-52e
20595855
Epilepsy Behav. 2010 Apr;17(4):541-5
20236867
Am J Prev Med. 2010 Mar;38(3):e1-3
20171526
Nurse Educ. 2009 Jan-Feb;34(1):23-8
19104342
J Vet Med Educ. 2007 Summer;34(3):330-4
17673793
Urology. 2010 Mar;75(3):619-22
19815255
Brief Bioinform. 2010 Nov;11(6):563-9
20570844
Am J Prev Med. 2008 Oct;35(4):389-92
18675530
Clin Pediatr (Phila). 2010 Mar;49(3):274-9
19596864
JAMA. 2007 Dec 5;298(21):2482-4
18056901
Nurse Educ. 2010 May-Jun;35(3):127-9
20410751
Cyberpsychol Behav Soc Netw. 2010 Apr;13(2):141-52
20528269
Telemed J E Health. 2009 Apr;15(3):255-60
19382863
Health Commun. 2010 Apr;25(3):238-46
20461609
Breast. 2009 Dec;18(6):387-92
19913416
Clin Gastroenterol Hepatol. 2009 Aug;7(8):894-9
19558999