title: Complaint-severity and cervical spine problems successfully classified patients with shoulder complaints.
abstract: OBJECTIVE
  To construct a classification of patients with shoulder complaints based on their physical examination. To investigate (1) the interobserver reliability, (2) to what extent the setting in which the patients were recruited, and demographic and clinical characteristics are related to the classification.
  
  
  METHODS
  Data from 132 patients with shoulder complaints recruited in various health care settings in The Netherlands were examined. Two observers independently performed a physical examination of the cervical spine and shoulder joint. A nonmetric multidimensional scaling procedure was performed for each observer separately. The interobserver reliability of both observers was computed. Differences between setting, demographic and clinical characteristics, and the resulting dimensions were investigated.
  
  
  RESULTS
  For both observers two dimensions (severity of complaints of the shoulder joint, and severity of problems of the cervical spine) were sufficient to classify all patients. Agreement between the two observers was good (r=0.84) to moderate (r=0.69). Patients with neck pain in history taking showed higher scores on both dimensions.
  
  
  CONCLUSIONS
  Despite moderate interobserver agreement for each variable from physical examination found in previous studies, observers agree on the scores of the patients on the relevant dimensions. Given the limited number of effective treatments available to the general practitioner, a more sophisticated classification system seems unnecessary.
authors.affiliation: Department of General Practice, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands. k.h.groenier@med.rug.nl
authors.forename: Klaas H
authors.initials: KH
authors.lastname: Groenier
authors.forename: Andrea F
authors.initials: AF
authors.lastname: de Winter
authors.forename: Jan C
authors.initials: JC
authors.lastname: Winters
authors.forename: Henrica C W
authors.initials: HC
authors.lastname: de Vet
authors.forename: Betty
authors.initials: B
authors.lastname: Meyboom-de Jong
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002574:Cervical Vertebrae; D006801:Humans; D008487:Medical History Taking; D008875:Middle Aged; D019547:Neck Pain / Q000150:complications; D015588:Observer Variation; D010147:Pain Measurement; D010808:Physical Examination / Q000379:methods; D016059:Range of Motion, Articular; D012720:Severity of Illness Index; D012785:Shoulder Joint / Q000503:physiopathology; D020069:Shoulder Pain / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D013122:Spinal Diseases / Q000150:complications*