Table 1 General characteristics of participants in the Korea National Health and Nutrition Examination Survey (KNHANES), 1998–2021
Characteristics | KNHANES by round | |||||||
|---|---|---|---|---|---|---|---|---|
KNHANES I 1998 (N = 27,201) | KNHANES II 2001 (N = 26,854) | KNHANES III 2005 (N = 25,161) | KNHANES IV 2007–2009 (N = 18,210) | KNHANES V 2010–2012 (N = 19,394) | KNHANES VI 2013–2015 (N = 17,780) | KNHANES VII 2016–2018 (N = 19,197) | KNHANES VIII 2019–2021 (N = 18,511) | |
Response rate | 89.8% | 77.3% | 70.2% | 74.5% | 76.5% | 74.1% | 73.1% | 70.7% |
Number (%) | ||||||||
Sex | ||||||||
Male | 12,853 (47.3) | 12,647 (47.1) | 11,722 (46.6) | 7,836 (43.0) | 8,378 (43.2) | 7,709 (43.4) | 8,465 (44.1) | 8,270 (44.7) |
Female | 14,348 (52.7) | 14,207 (52.9) | 13,439 (53.4) | 10,374 (57.0) | 11,016 (56.8) | 10,071 (56.6) | 10,732 (55.9) | 10,241 (55.3) |
Age, year | ||||||||
20–29 | 5,594 (20.6) | 5,245 (19.5) | 4,315 (17.1) | 2,308 (12.7) | 2,102 (10.8) | 1,996 (11.2) | 2,161 (11.3) | 2,196 (11.9) |
30–39 | 6,808 (25.0) | 6,673 (24.8) | 5,582 (22.2) | 3,751 (20.6) | 3,631 (18.7) | 2,946 (16.6) | 3,077 (16.0) | 2,481 (13.4) |
40–49 | 5,549 (20.4) | 6,243 (23.2) | 5,868 (23.3) | 3,622 (19.9) | 3,509 (18.1) | 3,283 (18.5) | 3,582 (18.7) | 3,212 (17.4) |
50–59 | 4,017 (14.8) | 3,728 (13.9) | 3,975 (15.8) | 3,043 (16.7) | 3,697 (19.1) | 3,499 (19.7) | 3,667 (19.1) | 3,445 (18.6) |
60–69 | 3,212 (11.8) | 3,032 (11.3) | 3,217 (12.8) | 2,897 (15.9) | 3,261 (16.8) | 3,014 (17.0) | 3,337 (17.4) | 3,482 (18.8) |
70 + | 2,021 (7.4) | 1,933 (7.2) | 2,204 (8.8) | 2,589 (14.2) | 3,194 (16.5) | 3,042 (17.1) | 3,373 (17.6) | 3,695 (20.0) |
Mean (95% CI) | ||||||||
Body mass index, kg/m2 | 23.2 (23.1–23.2) | 23.5 (23.4–23.6) | 23.6 (23.5–23.8) | 23.6 (23.6–23.7) | 23.7 (23.6–23.8) | 23.8 (23.7–23.9) | 24.0 (23.9–24.1) | 24.1 (24.1–24.2) |
Systolic blood pressure, mm Hg | 125.0 (124.3–125.7) | 122.8 (121.9–123.7) | 118.0 (117.3–118.7) | 115.5 (115.0–115.9) | 117.6 (117.2–118.0) | 116.9 (116.6–117.3) | 117.8 (117.4–118.2) | 118.7 (118.3–119.0) |
Diastolic blood pressure, mm Hg | 78.3 (77.9–78.8) | 77.3 (76.8–77.9) | 77.1 (76.5–77.7) | 75.4 (75.1–75.7) | 75.6 (75.3–75.9) | 75.1 (74.8–75.3) | 75.9 (75.7–76.1) | 75.5 (75.2–75.7) |
Fasting glucose, mg/dL | 100.8 (99.5–102.0) | 97.5 (96.7–98.3) | 93.9 (93.2–94.6) | 96.4 (95.9–96.8) | 96.8 (96.3–97.2) | 99.0 (98.5–99.4) | 99.9 (99.5–100.4) | 101.0 (100.5–101.4) |
Total cholesterol, mg/dL | 187.1 (185.8–188.4) | 188.8 (187.7–190.0) | 183.2 (181.9–184.5) | 186.2 (185.4–187.0) | 188.4 (187.6–189.2) | 188.4 (187.7–189.2) | 193.0 (192.3–193.8) | 192.1 (191.3–192.8) |
Triglyceride, mg/dL | 121.4 (119.4–123.5) | 138.8 (136.2–141.4) | 133.9 (129.7–138.0) | 135.0 (132.8–137.1) | 134.6 (132.2–137.1) | 139.3 (137.0–141.7) | 139.5 (137.0–142.0) | 132.9 (130.7–135.1) |
LDL-cholesterol, mg/dL | 113.3 (112.1–114.5) | 114.8 (113.6–116.0) | 113.1 (112.0–114.2) | 110.7 (109.1–112.3) | 113.6 (112.4–114.8) | 114.5 (113.5–115.4) | 118.9 (117.3–120.5) | 116.8 (115.0–118.5) |
HDL-cholesterol, mg/dL | 50.0 (49.7–50.4) | 46.2 (45.7–46.8) | 45.0 (44.6–45.4) | 48.1 (47.9–48.4) | 49.7 (49.4–50.0) | 51.0 (50.8–51.2) | 51.0 (50.8–51.3) | 52.2 (51.9–52.4) |