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Incidence of medically recognized migraine: A 1989-1990 study in Olmsted County, Minnesota
T D Rozen1, J W Swanson, P E Stang
1Department of Neurology, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA.
Objective:
To investigate the incidence of medically recognized migraine in Olmsted County, Minnesota, during the years 1989 to 1990.
Methods:
We used the records-linkage system of the Rochester Epidemiology Project to identify all subjects who sought medical attention for their headache and had their initial visit for migraine within the study period. Incident cases were classified using specified criteria.
Results:
From 9837 records screened, we found 713 incident cases. The average annual incidence rate (new cases per 100 000 person-years) was 343.0 in both sexes combined, 481.6 in women, and 194.4 in men. In women, incidence rates were low at the extremes of age and higher among those aged between 10 and 49 years, with a striking peak at the age of 20 to 29 years. Migraine without aura was the most common type of migraine in women. Men had a more constant risk of migraine throughout life with a lesser peak at the age of 10 to 19 years, and they were equally affected by all types of migraine. Women had consistently higher incidence rates than men at all ages, and there were strikingly higher incidence rates of migraine without aura in women than in men.
Conclusions:
Although our incidence rates were restricted to medically recognized cases of migraine, we confirmed previously reported epidemiological patterns.
Insights
This study found that medically recognized migraine affected 343 per 100,000 people annually. Women experienced higher migraine incidence rates than men, particularly migraine without aura.
Area of Science:
- Neurology
- Epidemiology
Background:
- Migraine is a common neurological disorder with significant public health implications.
- Understanding migraine incidence patterns is crucial for effective public health strategies and resource allocation.
Purpose of the Study:
- To determine the annual incidence rates of medically recognized migraine in Olmsted County, Minnesota, between 1989 and 1990.
- To analyze age- and sex-specific incidence patterns of migraine.
Main Methods:
- Utilized the Rochester Epidemiology Project's records-linkage system to identify incident migraine cases.
- Screened 9837 records, classifying 713 individuals as new migraine cases based on specified diagnostic criteria.
Main Results:
- The overall annual incidence rate was 343.0 per 100,000 person-years.
- Women exhibited higher incidence rates (481.6/100,000) than men (194.4/100,000).
- Migraine incidence peaked in women aged 20-29 years and men aged 10-19 years, with migraine without aura being more prevalent in women.
Conclusions:
- The study confirmed previously reported epidemiological patterns of migraine.
- Incidence rates were limited to medically recognized cases, highlighting the importance of seeking medical attention for diagnosis.