[Assessment of clinical assessment reliability among researchers of a multicenter clinical trial].
BACKGROUND
Interater agreement is a main aspect in the planning and conducting a clinical trial. The objective of this study is to show the application of assessing levels of interexaminer's agreement when multiple ratings are made on a single subject as an efficient method of evaluating the interater's reliability in planning a multicenter clinical trial.


METHODS
39 psychiatrist assessed videotape of a patient with depression. The use of any reliability statistics is failed in the analysis of multiple independent ratings of a single subject since we used the methodology proposed by Cichetti et al. This method is able to identify raters whose ratings differ significantly from the average ratings and is sensitive for different levels of agreement.


RESULTS
Interarter agreement was between good and excellent. The raters show an adequate agreement in total and items scores.


CONCLUSIONS
The design proposed permits evaluate the interater agreement in an efficient way (only in one session).
Baca-García
E
E
Servicio de Psiquiatría, Hospital Ramón y Cajal, Universidad de Alcalá, Madrid.
Díaz-Sastre
C
C
Rico
F
F
Sáiz Ruiz
J
J
D002986:Clinical Trials as Topic; D006801:Humans; D019964:Mood Disorders / Q000175:diagnosis; D015337:Multicenter Studies as Topic; D015588:Observer Variation; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results