Ankylosing spondylitis in Rochester, Minnesota, 1935-1989. Is the epidemiology changing? - PubMed (original) (raw)

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

doi: 10.1002/art.1780351211.

Affiliations

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

L D Carbone et al. Arthritis Rheum. 1992 Dec.

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.

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