Statistical analyses from this community-based, random sample drawn from a selected sample of the elderly Korean population showed that restricted activity appears to be significantly associated with SI.

BackgroundThe aim of this study was to assess in amyloidosis prevalence in Korea between 2006 and 2015.MethodsPrimary diagnoses related to amyloidosis, regardless of subtype, were collected from the Korean National Health Insurance Service from 2006 through 2015.ResultsOverall, the age-standardized prevalence of amyloidosis was 0.93 (95% confidence interval (CI) 0.81, 1.04) persons per 100,000 persons in 2006 and 1.91 (95% CI 1.78, 2.05) persons per 100,000 persons in 2015. This included an increase from 0.43 (95% CI 0.35, 0.51) to 1.04 (95% CI 0.94, 1.14) persons per 100,000 persons in men and from 0.49 (95% CI 0.40, 0.57) to 0.87 (95% CI 0.77, 0.96) persons per 100,000 persons in women. In particular, the age-standardized prevalence of amyloidosis showed a greater increase in patients aged 65 years or older and in patients aged 45–64 years than in patients aged 20–44 years, for both men and women.ConclusionsThe overall age-standardized prevalence of amyloidosis was approximately 2 persons per 100,000 persons in 2015. The overall age-standardized prevalence of amyloidosis increased between 2006 and 2015, especially in individuals aged 45–64 and older than 65 years.Electronic supplementary materialThe online version of this article (10.1186/s13023-017-0705-2) contains supplementary material, which is available to authorized users.

Background: Few studies used nationwide data to assess the age-standardized prevalence rate, incidence rate, 10-year survival rate, and death risk of thromboangiitis obliterans (TAO; Buerger's disease).Methods: Data for 24,392 patients who had newly diagnoses related to TAO (I73.1) from 2006 through 2017 were extracted from the National Health Insurance Service in Korea. The age-standardized prevalence rate, incidence rate, 10-year survival rate, and death risk of TAO were analyzed. Results: The mean (standard deviation) age of TAO patients overall was 62.0 (15.7) years; 61.3 (15.4) in males and 63.2 (16.1) in females (P<0.001). The proportion of patients older than 50 years old was about 80% overall. The proportion patients who died of TAO was 28.1%. Overall, the age-standardized prevalence rate of TAO decreased from 11.1 persons per 100,000 persons in 2006 to 8.43 persons in 2017, and overall, the incidence rate of TAO decreased from 6.07 persons in 2006 to 3.38 persons in 2017. Theage-standardized prevalence rate and incidence rate in males were higher than that in females. The 10-year survival rate of TAO was about 65% (60.7% in males and 72.5% in females). The adjusted hazard ratio increased significantly with older age, male sex, hypertension, diabetes mellitus, myocardial infarction, heart failure, ischemic stroke, hemorrhagic stroke, chronic kidney disease, and malignant neoplasm. Conclusions:The 10-year survival rate of TAO was about 65%. Even though the age-standardized prevalence rate and incidence rate of TAO is decreased during the study period, the adjusted hazard ratio showed significantly increases with age and with male sex after adjustment for comorbidities.