The age-standardised incidence of subarachnoid haemorrhage was 9.7 per 100,000 person-years, with a 30-day case fatality of 44% and increased mortality risk for patients over 60 years (RR 2.95).
Observational (n=800)
Relative Risk: 2.95 (95% CI 2.18–3.97)
OBJECTIVES: The purpose was to define the incidence and case fatality rates of subarachnoid haemorrhage in the population of Devon and Cornwall. METHODS: A retrospective population based design was employed with multiple overlapping methods of case ascertainment. A strict definition of subarachnoid haemorrhage was used. Age and sex specific incidence rates and relative risks for death at different time intervals are calculated. RESULTS: Eight hundred cases of first ever subarachnoid haemorrhage were identified; 77% of cases were verified by CT, 22% by necropsy, and 1% by lumbar puncture. The incidence rates are higher than those previously reported in the United Kingdom. The age standardised incidence rate (/100 000 person-years) for females was 11.9 (95% confidence interval (95% CI) 9.5-15.0), for males 7.4 (5.4-10.0), and the total rate was 9.7 (7.5-12.6). The case fatality rates at 24 hours, 1 week, and 30 days were 21 (18-24)%, 37 (33-41)%, and 44 (40-49)% respectively. The relative risk for death at 30 days for those over 60 years:under 60 years was 2.95 (2.18-3.97). CONCLUSION: The incidence of subarachnoid haemorrhage in the United Kingdom is higher than previously reported. Three quarters of the mortality occurs within 3 days.
Louis Pobereskin (Thu,) conducted a observational in Subarachnoid haemorrhage (n=800). Age over 60 years vs. Age under 60 years was evaluated on Death at 30 days (RR 2.95, 95% CI 2.18-3.97). The age-standardised incidence of subarachnoid haemorrhage was 9.7 per 100,000 person-years, with a 30-day case fatality of 44% and increased mortality risk for patients over 60 years (RR 2.95).