Mortality in the years following bacterial meningitis.

During the years 1966-1976, 875 patients were treated for bacterial meningitis at the University Clinic for Infectious Diseases, Copenhagen. By about January 1, 1980, all 782 surviving patients had been traced. 87 had died in the observation period of four to 15 years. Mortality in the years following meningitis was studied by means of a comparison with the expected mortality in a matched normal population, using a computer program for the determination of late excess mortality. Late excess mortality was significantly increased during the first two years following discharge after meningitis and was of the same magnitude in the major etiological groups. The cumulative five-year late excess mortality rate was higher in the group of patients between 30 and 60 years, in those transferred from other hospitals, in those in coma or somnolence on admission and in those developing convulsions during hospitalization. In the group of patients aged 30 to 60 years, 11 patients died during the first two years after discharge. In nine of these cases, the main cause or the concomitant causes of death were conditions predisposing to infections or bacterial meningitis. The frequency of the causes of death in the 87 patients who died was not significantly different from that among the general Danish population.