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Table 3 The prevalence of the metabolic syndrome according to demographic characteristics

From: Prevalence of the Metabolic Syndrome among Korean Workers by Occupational Group: Fifth Korean National Health and Nutrition Examination Survey (KNHANES) 2010

  Male Female
Demographics Number *† Prevalence (95% confidence intervals) Number *† Prevalence (95% confidence intervals)
Age group     
  20–29 years 152/1,942,533 9.2 (4.1–14.3) 231/1,733,502 3.5 (0.7–6.2)
  30–39 years 428/3,276,013 17.8 (13.5–22.1) 291/1,634,571 5.5 (2.0–9.0)
  40–49 years 477/3,659,709 25.9 (21.3–30.4) 371/2,433,142 12.5 (8.2–16.8)
  50–59 years 392/2,681,787 35.7 (30.2–41.2) 374/1,891,022 30.8 (25.2–36.5)
  60–69 years 297/1,176,249 36.4 (29.5–43.3) 188/758,966 38.0 (30.1–45.8)
  ≥ 70 years 113/415,885 17.4 (9.1–25.8) 93/373,407 53.5 (43.5–63.4)
Education     
  ≤ Elementary school 262/1,377,314 28.7 (21.5–35.8) 407/1,912,522 40.9 (35.6–46.2)
  Middle school 218/1,385,292 35.9 (29.0–42.8) 175/989,224 24.4 (16.6–32.3)
  High school 637/5,078,713 20.1 (16.4–23.7) 491/3,089796 9.3 (6.1–12.5)
  ≥ University 742/5,310,859 23.6 (19.9–27.4) 481/2,833,069 7.6 (4.2–11.1)
Household income     
  Low 224/1,362,396 25.9 (18.9–32.9) 239/1,171,008 35.3(28.6–41.9)
  Low–middle 476/3,488,782 21.4 (16.9–25.8) 366/2,177,822 19.8 (15.3–24.2)
  Middle–high 568/4,173,072 23.8 (19.4–28.2) 448/2,712,764 14.3 (10.7–18.0)
  High 575/4,051,739 25.5 (21.1–29.9) 481/2,648,160 10.4 (7.1–13.7)
High–risk drinking     
  Never 275/1,681,687 14.7 (9.6–19.9) 473/2,633,998 15.4 (11.2–19.7)
  Once a month 644/4,713,082 21.2 (17.4–24.9) 494/2,956,125 12.8 (9.3–16.4)
  Once a weak 490/3,727,662 26.0 (21.6–30.4) 130/932,867 17.4 (9.6–25.2)
  Everyday 226/1,602,909 38.1 (30.7–45.5) 23/152,018 31.1 (8.8–53.4)
Smoking status     
  Non–smoker 320/2,194,133 19.5 (14.4–24.5) 1,394/7,721,944 17.5 (14.9–20.2)
  Ex–smoker 697/4,369,598 27.0 (22.9–31.0) 81/546,406 16.0 (7.0–25.0)
  Current smoker 841/6,585,245 23.7 (20.1–27.3) 78/547,078 15.8 (6.7–24.9)
Vigorous physical activity     
  None 1,035/6,872,680 25.0 (21.9–28.1) 1,144/6,444,936 17.8 (14.4–20.7)
  < 5 days per week 659/4,976,027 23.7 (19.5–28.0) 293/1,726,743 17.3 (12.5–22.2)
  ≥ 5 days per week 164/1,300,269 20.2 (12.7–27.8) 115/633,191 14.8 (7.9–21.7)
Work hours     
  ≤ 40 hours per week 666/4,555,070 22.5 (18.6–26.5) 819/4,514,730 17.3 (13.9–20.7)
  > 40 hours per week 1,193/8,597,108 24.9 (21.8–28.0) 735/4,309,882 17.3 (14.3–20.4)
Work schedule pattern     
  Day working 1,526/10,805,797 24.5 (21.9–271) 1,312/7,305,852 18.3 (15.4–21.2)
  Non–day working 328/2,319,154 22.0 (16.6–27.4) 238/1,501,207 12.4 (6.8–18.1)
BMI category     
  Underweight 40/272,239 0.0 (0.0–0.0) 85/539,963 0.0 (0.0–0.0)
  Normal 1,099/7,673,502 12.9 (10.3–15.4) 1,053/6,039,293 9.4 (7.5–11.4)
  Overweight 654/4,672,170 39.1 (34.3–43.9) 350/1,858,859 41.9 (35.7–48.1)
  Obese 61/500,005 68.3 (54.1–82.5) 65/384,483 46.1 (32.3–59.9)
  1. *Subject number/estimated population number. Subject number varies due to item which was not answered. Unadjusted prevalence of the metabolic syndrome (95% confidence intervals).