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Arthritis Rheum. 1992 Dec;35(12):1476-82.

Ankylosing spondylitis in Rochester, Minnesota, 1935-1989. Is the epidemiology changing?

Author information

1
Department of Health Sciences Research, Mayo Clinic and Foundation, Rochester, Minnesota 55905.

Abstract

OBJECTIVE:

To determine trends in the incidence and clinical presentation of ankylosing spondylitis first diagnosed between 1935 and 1989 among residents of Rochester, Minnesota, and in the survival of the patients.

METHODS:

Population-based descriptive study.

RESULTS:

The overall age- and sex-adjusted incidence rate was 7.3 per 100,000 person-years (95% confidence interval 6.1-8.4). The rate tended to decline between 1935 and 1989, but there was little change in the age at symptom onset or diagnosis over the 55-year study period. Overall survival was not decreased up to 28 years following diagnosis.

CONCLUSION:

These data indicate that there is a constancy in the epidemiologic characteristics of ankylosing spondylitis and suggest that previously study results indicating changes may have been due to biases in patient selection and study design.

PMID:
1472124
DOI:
10.1002/art.1780351211
[Indexed for MEDLINE]

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