External Validity: A Forgotten Issue?

1. Dworkin SF, LeResche L. Research diagnostic criteria for temporomandibular disorders: Review, criteria, examinations and specifications, critique. J Craniomandib Disord Facial Oral Pain 1992;6:301–355.

2. Sonnesen L, Svensson P. Temporomandibular disorders and psychological status in adult patients with a deep bite. Eur J Orthod 2008;30:621–629.

3. Berkson J. Limitation of the application of fourfold table analysis to hospital data. J Biomet Bull 1946;2:47–53.

4. De Jongh A, Aartman IH, Parvaneh H, Ilik M. Symptoms of body dysmorphic disorder among people presenting for cosmetic dental treatment: A comparative study of cosmetic dental patients and a general population sample. Community Dent Oral Epidemiol 2009;37:350–356.

5. Vulink NC, Rosenberg A, Plooij JM, Koole R, Berge SJ, Denys D. Body dysmorphic disorder screening in maxillofacial outpatients presenting for orthognathic surgery. Int J Oral Maxillofac Surg 2008;37:985–991.

6. Biby EL. The relationship between body dysmorphic disorder and depression, self-esteem, somatization, and obsessive-compulsive disorder. J Clin Psychol 1998;54: 489–499.

7. Malt UF, Nerdrum P, Oppedal B, Gundersen R, Holte M, Lone J. Physical and mental problems attributed to dental amalgam fillings: A descriptive study of 99 self-referred patients compared with 272 controls. Psychosom Med 1997;59:32–41.

8. John MT, Slade GD, Szentpetery A, Setz JM. Oral health- related quality of life in patients treated with fixed, removable, and complete dentures 1 month and 6 to 12 months after treatment. Int J Prosthodont 2004;17:503–511.

9. Wacholder S, McLaughlin JK, Silverman DT, Mandel JS. Selection of controls in case-control studies. I. Principles. Am J Epidemiol 1992;135:1019–1028.

10. Farella M, Michelotti A, Iodice G, Milani S, Martina R. Unilateral posterior crossbite is not associated with TMJ clicking in young adolescents. J Dent Res 2007;86: 137–141.

11. Gesch D, Bernhardt O, Mack F, John U, Kocher T, Alte

D. Association of malocclusion and functional occlusion with subjective symptoms of TMD in adults: Results of the Study of Health in Pomerania (SHIP). Angle Orthod 2005;75:183–190.

12. John MT, Hirsch C, Drangsholt MT, Mancl LA, Setz JM. Overbite and overjet are not related to self-report of temporomandibular disorder symptoms. J Dent Res 2002; 81:164–169.

13. Cohen P, Cohen J. The clinician’s illusion. Arch Gen Psychiatry 1984;41:1178–1182.