Incidence, Prevalence, and Duration of Chronic Kidney Disease in Taiwan: Results from a Community-Based Screening Program of 106,094 Individuals

Abstract

Background/Aims: Taiwan has the highest incidence of end-stage renal disease, which requires renal replacement therapy. Chronic kidney disease (CKD) contributes to this burden. However, the current data on the epidemiologic features of CKD in Taiwan are incomplete. Therefore, we aimed to investigate the prevalence and incidence of CKD in a population-based study and then estimate the average dwelling time (ADT) in the main clinical burden of CKD (stages 3–5). Methods: A prospective cohort study was designed with an integrated community-based multiple screening program of 106,094 individuals aged ≥20 years in Keelung, Taiwan, in 1999–2009. Prevalence was estimated as the percentage of CKD stages among individuals attending the first screening, and incidence was expressed as the ratio of total desired events in the following period to the total observational time. Finally, ADT was estimated from the ratio of prevalence to incidence. Results: The participants’ mean age was 47.7 ± 15.4 years. The estimated prevalence was 15.46% for total CKD and 9.06% for CKD stages 3–5. The incidence was 27.21/1,000 person-years (PY) for total CKD and 16.89/1,000-PY for CKD stages 3–5. Older patients, males, and those patients with comorbidities of diabetes mellitus (DM), hypertension, and metabolic syndrome (MetS) exhibited higher prevalence and incidence rates than their opposing counterparts. Moreover, the ADT of CKD stages 3–5 was 5.37 years (95% CI 5.17–5.57). Males and those with comorbidities of DM or MetS had shorter ADTs in CKD stages 3–5 than their opposing counterparts. Interestingly, the ADT of participants with hypertension was longer than those without. Conclusions: The prevalence and incidence of CKD in Taiwan are high. Moreover, ADT in CKD stages 3–5 varied according to sex, age, and comorbidity. Further exploration of the factors associated with the shifting of this duration will shed light on effective CKD management.

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