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Table 1 General characteristics of KNHEB* cohort participants (2002–2003) and KHANES** participants (2001) (unit: %)

From: Cohort profile: the Korean National Health Examination Baseline (KNHEB) cohort for longitudinal health monitoring in South Korea

 

KNHEB cohort, 2002 − 2003

(n = 8,916,544)

KNHANES cohort, 2001

(n = 27,318)

Sex

  

 Male

59.5

47.1

 Female

40.5

52.9

Age (y)

  

 Mean (SD)

44.2 (13.8)

44.3 (0.2)

 19 − 29

16.2

21.2

 30 − 39

22.9

24.5

 40 − 49

27.3

22.9

 50 − 59

16.7

13.5

 60 − 69

11.9

11.0

 ≥ 70

4.8

6.9

Insurance type

  

 Self-employed insured

24.0

47.2

 Employed insured

76.0

49.0

 Medical aid beneficiary

0.0

3.1

Risk factors

  

Smoking status

  

 Never smokers

58.4

61.1

 Former smokers

9.3

8.7

 Current smokers

29.9

30.2

Drinking frequency

  

 Never

47.4

57.4

 2 − 3 per month

20.8

14.2

 1 − 2 per week

20.4

15.4

 3 − 4 per week

6.6

7.3

 Almost everyday

3.1

4.8

Physical activity

  

 Never

54.7

72.4

 1 − 2 per week

25.7

6.9

 3 − 4 per week

8.9

8.7

 5 − 6 per week

2.2

7.0

 Almost everyday

5.0

4.8

Weight status

  

 Underweight (BMI*** < 18.5)

4.1

5.4

 Normal (18.5 ≤ BMI < 25)

64.5

64.5

 Obese (BMI ≥ 25)

31.4

30.1

  1. * KNHEB: Korean National Health Examination Baseline
  2. ** KHANES: Korea National Health and Nutrition Examinations Survey
  3. *** BMI, body mass index
  4. All risk factor variables were collected using the same methods in both datasets, except for physical activity. The KNHEB cohort used categorical response options for physical activity (as shown in the table), whereas KNHANES recorded open-ended numeric responses for weekly exercise frequency. While responses were categorized to align with the KNHEB format for comparison, differences in questionnaire structure may have influenced the distribution
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BMC Public Health

ISSN: 1471-2458

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