title: Personality in keratoconus in a sample of patients derived from the internet.
abstract: OBJECTIVE
  Keratoconus is a corneal disease that manifests itself in young adulthood and decreases vision. Anecdotally, keratoconus patients are commonly described as having unusual personality characteristics; however, previous researchers have not been able to define a unique keratoconus personality profile. We sought to better define the personality of patients with keratoconus.
  
  
  METHODS
  The Millon Behavioral Health Inventory (MBHI) is a psychological instrument designed for use with physically ill patients to assess factors relevant to their medical care. The MBHI may aid in the evaluation of keratoconus patients and provide information relevant to the doctor-patient relationship. Patients with keratoconus were recruited through the World Wide Web. Surveys were conducted by mail, with all responses returned anonymously. One hundred fifty-three keratoconus patients were compared with the MBHI age-matched norms, generated from medical and nonmedical samples of adults. Subgroups of keratoconus patients were compared based on their self-reported rating of the daily burden of keratoconus.
  
  
  RESULTS
  Keratoconus patients scored significantly lower (chi, P <0.05) compared with the normative population on the respectful coping style scale, and their scores were not significantly associated with a history of penetrating keratoplasty or their rating of the effect of keratoconus on their lives. This suggests that keratoconus patients are less respectful of practitioners, uncooperative, and noncompliant with treatment plans. Practitioners may look unfavorably on patients who exhibit these characteristics. This would also explain why the clinical perception of keratoconus patients persists, but other personality inventories have not defined a distinct keratoconus profile.
  
  
  CONCLUSIONS
  These data from the MBHI, showing that keratoconus patients score lower on the respectful coping style scale, may explain eye care practitioners' perceptions about these patients' personality characteristics.
authors.affiliation: The Ohio State University College of Optometry, Columbus, OH 43210-1240, USA.
authors.forename: Kerry K
authors.initials: KK
authors.lastname: Giedd
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Mannis
authors.forename: G Lynn
authors.initials: GL
authors.lastname: Mitchell
authors.forename: Karla
authors.initials: K
authors.lastname: Zadnik
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001294:Attitude to Health; D005260:Female; D014943:Global Health; D006306:Health Surveys; D006801:Humans; D020407:Internet; D007640:Keratoconus / Q000523:psychology* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D010551:Personality; D010817:Physician-Patient Relations; D011785:Quality Assurance, Health Care / Q000379:methods; D011788:Quality of Life / Q000523:psychology*