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Table 2 Distribution of cardiovascular risk factors

From: Cardiovascular Disease Risk of Bus Drivers in a City of Korea

   BUS drivers (443)     KNHANES*    
     Group A (696)†    Group B (221)‡   
   % 95% CI % 95% CI p-value* % 95% CI p-value*
Age < 50 28.4 (24.2-32.8) 34.8 (28.4-42.5) 0.404 34.2 (24.3-37.7) 0.552
  50-59 59.1 (54.5-63.7) 57.5 (52.8-62.0)   56.9 (48.5-65.0)  
  ≥ 60 12.5 (9.7-15.5) 7.7 (6.2-9.6)   8.9 (5.6-14.0)  
Smoking Non 14.8 (11.8-18.0) 14.3 (11.7-17.4) 0.712 7.0 (3.8-12.4) 0.151
  Ex 43.4 (38.8-48.0) 38.3 (33.6-43.3)   41.8 (35.2-48.7)  
  Current 41.8 (37.4-46.4) 47.4 (42.9-51.9)   51.2 (44.8-57.6)  
Drinking No/proper 74.6 (70.2-78.8) 76.1 (71.7-80.0) 0.869 75.7 (67.7-82.2) 0.920
  High risk 25.4 (21.2-29.8) 23.9 (20.0-28.3)   24.3 (17.8-32.3)  
Exercise Yes 23.3 (19.4-27.5) 33.3 (29.4-37.5) 0.116 34.5 (27.6-42.0) 0.080
  No 76.7 (72.5-80.6) 66.7 (62.5-70.6)   65.5 (58.0-72.4)  
BMI < 25.0 46.7 (41.8-51.3) 60.5 (56.2-64.6) 0.050 61.8 (54.3-68.8) 0.032
  ≥ 25.0 53.3 (48.7-58.2) 39.5 (35.4-43.8)   38.2 (31.2-45.7)  
WC < 90 59.1 (54.3-64.0) 72.8 (68.8-76.4) 0.057 76.4 (68.8-82.5) 0.013
  ≥ 90 40.9 (36.0-45.7) 27.2 (23.6-31.2)   23.6 (17.5-31.2)  
BP Normal 8.8 (6.2-11.5) 40.8 (35.9-45.9) 0.000 43.8 (35.7-52.2) 0.000
  Pre HTN 37.9 (33.5-42.7) 41.6 (36.7-46.7)   36.5 (28.8-44.9)  
  HTN 53.3 (48.5-57.7) 17.6 (14.2-21.5)   19.7 (14.3-26.6)  
ISH No 67.4 (63.3-71.8) 96.2 (94.1-97.6) 0.000 97.2 (94.6-98.6) 0.000
  Yes 32.6 (28.2-36.7) 3.8 (2.4-5.9)   2.8 (1.4-5.4)  
Glucose < 110 73.2 (69.1-77.4) 78.9 (75.1-82.3) 0.344 82.9 (76.7-87.8) 0.097
  ≥ 110 26.8 (22.6-30.9) 21.1 (17.7-24.9)   17.1 (12.2-23.3)  
TC < 200 61.4 (56.8-65.8) 57.3 (52.8-61.7) 0.822 60.5 (52.2-68.2) 0.985
  200-239 28.9 (24.2-33.3) 33.1 (28.8-37.8)   30.2 (22.9-38.7)  
  ≥ 240 9.7 (6.9-12.5) 9.6 (7.2-12.6)   9.3 (5.7-14.7)  
LDL-C < 130 74.6 (70.7-78.5) 69.8 (65.2-74.0) 0.537 68.8 (54.6-78.9) 0.285
  130-159 19.6 (15.9-23.3) 20.3 (17.0-24.0)   19.8 (11.9-31.2)  
  ≥160 5.8 (3.5-8.1) 9.9 (7.2-13.6)   12.2 (5.9-23.7)  
TG < 150 35.8 (31.2-40.6) 54.4 (49.7-58.9) 0.015 47.8 (39.5-56.2) 0.190
  150-199 19.6 (15.9-23.3) 19.1 (16.0-22.7)   18.7 (13.3-25.7)  
  ≥ 200 44.6 (40.0-49.4) 26.5 (23.1-30.3)   33.5 (25.9-42.1)  
HDL-C ≥ 60 9.0 (6.2-11.8) 17.9 (14.4-21.9) 0.020 18.5 (12.6-26.2) 0.139
  59-40 54.7 (50.1-59.6) 61.6 (56.9-66.1)   51.2 (43.4-59.0)  
  < 40 36.3 (31.9-40.4) 20.5 (17.0-24.6)   30.3 (24.1-37.3)  
MS No 50.1 (45.3-55.0) 77.4 (73.8-80.6) 0.000 76.2 (68.5-82.5) 0.000
  Yes 49.9 (45.0-54.7) 22.6 (19.4-26.2)   23.8 (17.5-31.5)  
CHD risk equivalent§ No 82.9 (79.2-86.4) 89.9 (86.8-92.3) 0.148 88.4 (82.1-92.8) 0.267
Yes 17.1 (13.6-20.8) 10.1 (7.7-13.2)   11.6 (7.2-17.9)  
CV event risk Low 45.7 (40.6-50.6) 71.1 (66.9-74.9)   67.6 (59.3-74.8)  
Medium 41.6 (37.0-46.4) 25.1 (21.4-29.3) 0.001 29.5 (22.6-37.6) 0.004
  High 12.7 (9.7-15.9) 3.8 (2.4-6.1)   2.9 (1.1-7.3)  
  1. p-value were tested by chi-square test, 95% CI of frequency ratio by bootstrapping method.
  2. BMI (kg/m2): body mass index, WC (cm): waist circumference.
  3. BP: blood pressure, HTN: hypertension, ISH: isolated systolic hypertension, TC (mg/dl): total cholesterol, TG (mg/dl): triglyceride, LDL-C (mg/dl): low density lipoprotein cholesterol, HDL-C (mg/dl): high density lipoprotein cholesterol, MS: metabolic syndrome.
  4. *Weighted proportion of 2010’ Korean National Health and Nutrition Examination Survey.
  5. †Group A: All employer (weighted number 4,830,156; unweighted case 696).
  6. ‡Group B: Crafts and machine operators(weighted number 1,629,428; unweighted case 221).
  7. §CHD risk equivalent: >20% per 10-year of Framingham coronary heart disease risk score.
  8. Cardiovascular disease event as stroke or myocardial infarction, High; both metabolic syndrome an CHD risk equivalent, Medium; one of the two, Low; neither metabolic syndrome nor CHD risk equivalent.