Table 2. Prevalence of CKD among adults aged ≥ 20 years by disease stage and selected characteristics: complex samples analysis (Korean National Health and Nutrition Examination Survey, 2011−2013 [study sample n = 15,319]).
| Characteristics | Weighted total number estimate* | Weighted percent estimate (95% confidence interval) of the CKD prevalence | |||||
|---|---|---|---|---|---|---|---|
| All CKD | Stage 1 | Stage 2 | Stage 3A | Stage 3B | Stages 4–5 | ||
| Total | 33,461,134 | 8.2 (7.6–8.8) | 3.0 (2.7–3.4) | 2.7 (2.4–3.0) | 1.9 (1.7–2.1) | 0.4 (0.3–0.5) | 0.2 (0.1–0.3) |
| Age group, yr | |||||||
| ≥ 60 | 6,809,154 | 22.0 (20.5–23.5) | 3.0 (2.4–3.7) | 8.7 (7.7–9.8) | 8.1 (7.2–9.1) | 1.7 (1.3–2.2) | 0.5 (0.3–0.8) |
| 40–59 | 14,169,087 | 6.4 (5.6–7.2) | 3.6 (3.1–4.2) | 1.9 (1.6–2.4) | 0.5 (0.3–0.8) | 0.1 (0.1–0.3) | 0.2 (0.1–0.3) |
| 20–39 | 12,482,893 | 2.8 (2.3–3.4) | 2.4 (1.9–2.9) | 0.3 (0.2–0.6) | 0.0 (0.0–0.2) | 0.0 (0.0–0.1) | 0.0 (0.0–0.2) |
| Sex | |||||||
| Female | 15,799,793 | 8.9 (8.2–9.7) | 3.5 (3.0–4.0) | 3.0 (2.6–3.4) | 1.9 (1.6–2.2) | 0.4 (0.3–0.6) | 0.2 (0.1–0.4) |
| Male | 17,661,341 | 7.5 (6.9–8.3) | 2.6 (2.2–3.1) | 2.5 (2.1–2.9) | 1.9 (1.6–2.2) | 0.4 (0.3–0.6) | 0.13 (0.1–0.2) |
| Diabetes | |||||||
| Yes | 2,905,239 | 27.6 (25.1–30.3) | 7.7 (6.2–9.5) | 10.3 (8.7–12.1) | 6.9 (5.7–8.4) | 1.9 (1.3–2.8) | 0.9 (0.5–1.7) |
| No | 28,686,661 | 6.0 (5.5–6.6) | 2.5 (2.2–2.9) | 1.9 (1.7–2.2) | 1.3 (1.1–1.5) | 0.2 (0.2–0.3) | 0.1 (0.1–0.2) |
| Hypertension | |||||||
| Yes | 8,572,299 | 19.6 (18.1–21.1) | 5.6 (4.8–6.6) | 7.2 (6.3–8.2) | 5.1 (4.4–5.8) | 1.1 (0.9–1.5) | 0.6 (0.4–0.9) |
| No | 23,560,793 | 6.0 (5.5–6.6) | 2.5 (2.2–2.9) | 1.9 (1.7–2.2) | 1.3 (1.1–1.5) | 0.2 (0.2–0.3) | 0.1 (0.1–0.2) |
| Diagnosed cardiovascular disease | |||||||
| Yes | 1,045,184 | 27.8 (24.0–31.8) | 3.5 (2.2–5.4) | 7.0 (5.2–9.5) | 13.1 (10.5–16.3) | 2.6 (1.6–4.1) | 1.6 (0.7–3.5) |
| No | 31,188,050 | 7.5 (6.9–8.0) | 3.0 (2.7–3.4) | 2.6 (2.3–2.9) | 1.5 (1.3–1.7) | 0.3 (0.2–0.4) | 0.1 (0.1–0.2) |
| Body mass index, kg/m2 | |||||||
| ≥ 30.0 | 1,557,195 | 14.2 (11.3–17.7) | 6.5 (4.5–9.1) | 5.5 (3.8–7.9) | 1.5 (0.8–2.7) | 0.4 (0.1–1.0) | 0.3 (0.1–2.3) |
| 25.0–29.9 | 9,632,344 | 11.1 (10.1–12.2) | 3.8 (3.2–4.5) | 4.0 (3.4–4.7) | 2.5 (2.1–3.0) | 0.6 (0.4–0.9) | 0.2 (0.1–0.5) |
| 18.5–24.9 | 20,843,849 | 6.5 (6.0–7.2) | 2.5 (2.1–2.9) | 2.0 (1.7–2.3) | 1.7 (1.4–2.0) | 0.3 (0.2–0.4) | 0.1 (0.1–0.2) |
| < 18 | 1,371,804 | 6.3 (4.5–8.7) | 2.7 (1.5–4.9) | 1.4 (0.7–2.8) | 1.3 (0.7–2.3) | 0.4 (0.1–1.3) | 0.5 (0.1–1.8) |
| Smoker | |||||||
| Yes | 14,200,575 | 8.2 (7.4–9.1) | 3.0 (2.4–3.6) | 2.6 (2.2–3.1) | 2.1 (1.8–2.4) | 0.4 (0.3–0.6) | 0.1 (0.1–0.3) |
| No | 18,002,158 | 8.0 (7.3–8.8) | 3.1 (2.7–3.5) | 2.7 (2.4–3.2) | 1.6 (1.4–1.9) | 0.4 (0.3–0.5) | 0.2 (0.1–0.4) |
CKD, chronic kidney disease.
*Numbers are presented as the weighted total number estimate of each population.