AIMS: Our aim was to conduct an epidemiological study of the incidence of non-traumatic @entity510 (NTSAH) and to evaluate a history of arterial @entity101 (AHT) as a risk factor (RF). We also sought to determine the gross annual rate (GAR) and specific rates, by sex and age, of first episode non-traumatic @entity510 (FENTSAH) adjusted to the Censo Nacional de Poblaci  n de la Argentina (CNPA), and to carry out a population-based case-control study about the history of AHT as a RF in an Argentine community. @entity1 AND METHODS: Our institution, the Hospital Privado de Comunidad de Mar del Plata, Argentina, attends a population of about 89,500 individuals exclusively and completely. There is a single filing system of case histories with all the diagnoses in a database. @entity1 who suffered a FENTSAH between the years 1992 and 1996 (n=62) were investigated to determine the specific GAR by sex and age and adjusted to the 1991 CNPA. The population was compared at random with two controls per case for the study of a history of AHT as a RF, and was then stratified according to sex and age. RESULTS: 1. GAR: 13.6/100,000 inhab./year; 2. Specific rate for males: 10.5/100,000 inhab./year; 3. Specific rate for females: 15.9/100,000 inhab./year; 4. CNPA adjusted rate: 7.3/100,000 inhab./year; 5. A significantly important number of @entity1 with FENTSAH presented a history of @entity101 as compared to controls subjects (odds ratio: 4.73; CI 95%: 2.39 9.34). CONCLUSIONS: Our rates are not substantially different from the rates found in other western countries and our findings indicate that a history of AHT is a RF for FENTSAH.

[First episode non-traumatic @entity510 . An epidemiological study of incidence and of arterial XXXX as a risk factor].

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'PATIENTS'] @entity101 :: ('MESH:D006973', 'Disease') :: ['hypertension'] @entity510 :: ('MESH:D013345', 'Disease') :: ['subarachnoid haemorrhage']
@entity101 :: (MESH:D006973,Disease) :: ['hypertension']
