[Validation of a screening instrument for studying the prevalence of cerebrovascular diseases in the Chilean population].
We assessed a screening instrument, adapted from a model suggested by WHO, aimed to perform population studies on the prevalence of cerebrovascular disease in Chile. Sixty-two subjects, 31 with cerebrovascular diseases and 31 without, were asked about symptoms and requested to do simple movements by trained interviewers. The results of the instrument were compared with a neurological examination performed by two specialists. Global sensitivity and specificity of the instrument, using WHO evaluation criteria, were 100 and 38.7% respectively. When three or more symptoms and one positive sign were considered as cutoff points, global specificity increased to 61% and sensitivity decreased to 93%. It is concluded that the present instrument is highly sensitive but lacks specificity.
Unidad de Neurología, Universidad de Chile, Santiago de Chile.
P
P
Lavados
C
C
Sacks
G
G
Alvarez
F
F
Araya
W
W
Feuerhacke
J
J
Monsalve
K
K
Kleinsteuber
L
L
Prina
V
V
Fernández
J
J
Hernández
D000368:Aged; D002561:Cerebrovascular Disorders / Q000453:epidemiology*; D002677:Chile; D003430:Cross-Sectional Studies; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires
Validación de un instrumento de tamizaje para el estudio de la prevalencia de enfermedades cerebrovasculares en la población chilena.