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Age-adjusted rates were calculated overall and for each sex and region using the 2000 projected US population ([14]). For each proportion, 95% CIs were calculated. When fewer than 15 cases were available, the incidence was calculated, but age-adjusted estimates were not. The prevalence of individual ACR criteria in prevalent cases meeting our primary case definition was calculated overall and by region. Differences between the prevalence of ACR criteria by region were analyzed by chi-square or Fisher's exact test as appropriate. Two-sided P values less than 0.05 were considered significant. Statistical analyses were performed using OpenEpi version 3.01 ([17]), SAS version 9.3, and Stata.IC version 11.2 for Windows. The flow chart for inclusion in the registry http://www.selleck.cn/products/pexidartinib-plx3397.html is shown in Figure 1. The denominators for each http://www.selleckchem.com/products/chir-99021-ct99021-hcl.html region represent the active clinical population for all communities of interest included in the registry in 2007. Potential cases were identified from these denominators for chart abstraction, as described above. The number of validated cases according to the primary case definition is shown, further subdivided into prevalent cases in 2007 and incident cases in 2008�C2009. The total number of prevalent cases validated by the primary case definition was 285. The cases not validated included miscoded cases, cases with alternate diagnoses, and cases with insufficient ACR criteria for classification as SLE. The percentage of cases validated was lowest in the Oklahoma region ( http://www.selleckchem.com/products/Y-27632.html 1. The age-adjusted prevalence of SLE in the combined regions according to our primary definition was 178 per 100,000 population (95% CI 157�C200) and by our broader alternate definition was 190 per 100,000 population (95% CI 168�C213). The prevalence of SLE was significantly higher in women than in men (age-adjusted prevalence by primary definition 271 versus 54, with nonoverlapping 95% CIs). The age-adjusted prevalence was significantly higher in the Phoenix region for both the primary and alternate definitions (248 [95% CI 204�C297] and 263 [95% CI 219�C315], respectively) compared with those in the Alaska and Oklahoma regions. The age-specific prevalence rates for the primary definition overall and by region and sex are shown in Figure 2. In women, the prevalence was highest in a broader age group 50�C69 years, while in men, it was highest in those 60�C69 years of age. The highest prevalence by region, sex, and age group was in women ages 50�C59 years in the Phoenix region (1,134 [95% CI 830�C1,546] by primary definition). The mean annual incidence of SLE is shown in Table 2.
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