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The incidence, causes, and secular trends of head trauma in Olmsted County, Minnesota, 1935-1974
Abstract:
Records in the Mayo Clinic linkage system were reviewed to determine the incidence of head trauma in Olmsted County, Minnesota, from 1935-1974. Minimum criteria for inclusion--loss of consciousness, posttraumatic amnesia, or skull fracture--were met by 3587 cases. During the decade from 1965-1974, the age-adjusted incidence rates per 100,000 population were 270 in males and 116 in females. The rate was highest--658--in males aged 15 to 24, but it was at least 50 in all age and sex groups. Major causes of head injury were automobile accidents (37%) and falls (29%). The incidence of head injuries related to automobiles and recreation has been increasing, whereas most other categories have remained stable or have declined. Of all cases, 446 were fatal, the average annual incidence being 32 per 100,000 in males and 9 per 100,000 in females. Among the groups at high risk of head trauma are those who have had head trauma previously.
Insights
Head trauma incidence in Olmsted County, Minnesota (1935-1974) was studied. Automobile accidents and falls were leading causes, with increasing trends in recreation-related head injuries.
Area of Science:
- Neurology
- Epidemiology
- Public Health
Background:
- Head trauma represents a significant public health concern.
- Understanding long-term incidence trends is crucial for prevention strategies.
Purpose of the Study:
- To determine the incidence of head trauma in Olmsted County, Minnesota, between 1935 and 1974.
- To identify major causes and risk factors associated with head injuries.
Main Methods:
- Review of medical records from the Mayo Clinic linkage system.
- Inclusion criteria: loss of consciousness, posttraumatic amnesia, or skull fracture.
- Age-adjusted incidence rates calculated per 100,000 population.
Main Results:
- 3587 cases met inclusion criteria between 1935-1974.
- From 1965-1974, age-adjusted incidence was 270/100,000 for males and 116/100,000 for females.
- Automobile accidents (37%) and falls (29%) were primary causes; recreation-related injuries showed an increasing trend.
Conclusions:
- Head trauma incidence varied by age and sex, with young males at highest risk.
- A history of previous head trauma is a significant risk factor.
- The study highlights the need for targeted prevention efforts, particularly for automobile and recreational injuries.