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Causal associations between changes in anemia status over time and adverse outcome development are not well characterized in community-dwelling subjects at the beginning of impaired kidney function.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>This retrospective cohort study used annual health checkup and medical and pharmacy claims data from the JMDC between January 2005 and June 2019. Community-dwelling subjects in Japan with a pre-index estimated glomerular filtration rate (eGFR)\u2009\u2265\u200960\u00a0mL\/min\/1.73 m<jats:sup>2<\/jats:sup> followed by a subsequent eGFR\u2009&lt;\u200960\u00a0mL\/min\/1.73 m<jats:sup>2<\/jats:sup> (index) were included. The composite renal outcome was\u2009\u2265\u200930% eGFR reduction over 3\u00a0years from baseline, serum creatinine doubling, progression to chronic dialysis, kidney transplantation, or eGFR\u2009&lt;\u200915\u00a0mL\/min\/1.73 m<jats:sup>2<\/jats:sup>. The composite cardiovascular outcome was fatal and non-fatal unstable angina, myocardial infarction, heart failure, or cerebrovascular event. Time-dependent anemia risk was evaluated using Breslow\u2019s estimator and marginal structural Cox models (MSM).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>In 32,870 included subjects, 1,396 had anemia at baseline. Adverse outcome incidence was higher in the baseline anemic group, but absolute differences in renal and cardiovascular outcomes between groups were diminished after adjusting for baseline characteristics. In MSM, time-dependent anemia status was associated with higher risk of renal (hazard ratio [95% confidence interval]; 2.6 [1.7\u20133.8]) and cardiovascular (1.6 [1.2\u20132.2]) outcomes and mortality (2.8 [1.8\u20134.3]). Absolute differences in survival probabilities were retained over time but were clinically marginal (1.1\u20132.7% over 6\u00a0years).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Even in subjects at the very early stage of impaired kidney function, early detection and treatment of anemia may help reduce the development of negative sequelae.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s10157-021-02137-1","type":"journal-article","created":{"date-parts":[[2021,10,1]],"date-time":"2021-10-01T12:05:25Z","timestamp":1633089925000},"page":"178-189","update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Estimating the causal effect of transient anemia status on renal and cardiovascular outcomes in community-dwelling patients in Japan at the beginning of impaired renal function using marginal structural modeling"],"prefix":"10.1007","volume":"26","author":[{"given":"Satoshi","family":"Onozawa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomomi","family":"Kimura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuichiro","family":"Ito","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tadao","family":"Akizawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,10,1]]},"reference":[{"issue":"6","key":"2137_CR1","doi-asserted-by":"publisher","first-page":"621","DOI":"10.1007\/s10157-009-0199-x","volume":"13","author":"E Imai","year":"2009","unstructured":"Imai E, Horio M, Watanabe T, et al. 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