Abstract
Objective. To determine time trends in the incidence and survival of polymyalgia rheumatica (PMR) over a 30 year period in Olmsted County, Minnesota, USA. Methods. Using the unified medical record linkage system of the Rochester Epidemiology Project, we identified all incident cases of PMR among residents of Olmsted County, MN, between January 1, 1970, and December 31, 1999. Incidence rates were estimated and age- and sex-adjusted to the 1990 US white population. The annual incidence rates were graphically illustrated using a 3 year centered moving average. A Poisson regression model was used to evaluate predictors of PMR incidence. Survival rates were computed and compared with the expected rates in the population. Results. There were 378 incident cases of PMR during the 30 year study period. Of these 66.6% were female and the mean age at incidence was 72.8 years. The overall age and sex adjusted annual incidence of PMR per 100,000 population aged ≥ 50 years was 58.7 (95% CI 52.8, 64.7). Incidence rates increased with age in both sexes, but in women, unlike in men, incidence fell after age 80. The incidence rates varied over the period of observation, but no significant trends over time were found. In the multivariable analysis, sex (p = 0.023), age (p < 0.001), and age2 (p < 0.001), but not calendar year (p = 0.24) were significant predictors of incidence. Survival among individuals with PMR was not significantly different from that expected in the population (p = 0.06). Conclusion. The incidence of PMR has remained relatively stable over the past 30 years.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1694-1697 |
| Number of pages | 4 |
| Journal | Journal of Rheumatology |
| Volume | 29 |
| Issue number | 8 |
| State | Published - 2002 |
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Keywords
- Epidemiology
- Incidence
- Polymyalgia rheumatica
ASJC Scopus subject areas
- Immunology
- Rheumatology
Cite this
Trends in the incidence of polymyalgia rheumatica over a 30 year period in Olmsted County, Minnesota, USA. / Doran, Michele F.; Crowson, Cynthia; O'Fallon, W. Michael; Hunder, Gene G.; Gabriel, Sherine E.
In: Journal of Rheumatology, Vol. 29, No. 8, 2002, p. 1694-1697.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Trends in the incidence of polymyalgia rheumatica over a 30 year period in Olmsted County, Minnesota, USA
AU - Doran, Michele F.
AU - Crowson, Cynthia
AU - O'Fallon, W. Michael
AU - Hunder, Gene G.
AU - Gabriel, Sherine E.
PY - 2002
Y1 - 2002
N2 - Objective. To determine time trends in the incidence and survival of polymyalgia rheumatica (PMR) over a 30 year period in Olmsted County, Minnesota, USA. Methods. Using the unified medical record linkage system of the Rochester Epidemiology Project, we identified all incident cases of PMR among residents of Olmsted County, MN, between January 1, 1970, and December 31, 1999. Incidence rates were estimated and age- and sex-adjusted to the 1990 US white population. The annual incidence rates were graphically illustrated using a 3 year centered moving average. A Poisson regression model was used to evaluate predictors of PMR incidence. Survival rates were computed and compared with the expected rates in the population. Results. There were 378 incident cases of PMR during the 30 year study period. Of these 66.6% were female and the mean age at incidence was 72.8 years. The overall age and sex adjusted annual incidence of PMR per 100,000 population aged ≥ 50 years was 58.7 (95% CI 52.8, 64.7). Incidence rates increased with age in both sexes, but in women, unlike in men, incidence fell after age 80. The incidence rates varied over the period of observation, but no significant trends over time were found. In the multivariable analysis, sex (p = 0.023), age (p < 0.001), and age2 (p < 0.001), but not calendar year (p = 0.24) were significant predictors of incidence. Survival among individuals with PMR was not significantly different from that expected in the population (p = 0.06). Conclusion. The incidence of PMR has remained relatively stable over the past 30 years.
AB - Objective. To determine time trends in the incidence and survival of polymyalgia rheumatica (PMR) over a 30 year period in Olmsted County, Minnesota, USA. Methods. Using the unified medical record linkage system of the Rochester Epidemiology Project, we identified all incident cases of PMR among residents of Olmsted County, MN, between January 1, 1970, and December 31, 1999. Incidence rates were estimated and age- and sex-adjusted to the 1990 US white population. The annual incidence rates were graphically illustrated using a 3 year centered moving average. A Poisson regression model was used to evaluate predictors of PMR incidence. Survival rates were computed and compared with the expected rates in the population. Results. There were 378 incident cases of PMR during the 30 year study period. Of these 66.6% were female and the mean age at incidence was 72.8 years. The overall age and sex adjusted annual incidence of PMR per 100,000 population aged ≥ 50 years was 58.7 (95% CI 52.8, 64.7). Incidence rates increased with age in both sexes, but in women, unlike in men, incidence fell after age 80. The incidence rates varied over the period of observation, but no significant trends over time were found. In the multivariable analysis, sex (p = 0.023), age (p < 0.001), and age2 (p < 0.001), but not calendar year (p = 0.24) were significant predictors of incidence. Survival among individuals with PMR was not significantly different from that expected in the population (p = 0.06). Conclusion. The incidence of PMR has remained relatively stable over the past 30 years.
KW - Epidemiology
KW - Incidence
KW - Polymyalgia rheumatica
UR - http://www.scopus.com/inward/record.url?scp=0036021153&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036021153&partnerID=8YFLogxK
M3 - Article
C2 - 12180732
AN - SCOPUS:0036021153
VL - 29
SP - 1694
EP - 1697
JO - Journal of Rheumatology
JF - Journal of Rheumatology
SN - 0315-162X
IS - 8
ER -