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Table 1 Characteristics of the study population (N = 11,591)

From: Cataract subtype risk factors identified from the Korea National Health and Nutrition Examination survey 2008–2010

 

n

%

1. Socio-demographic factors

  

Age (years)

  

  40–49

3353

28.9

  50–59

3019

26.1

  60–69

2813

24.3

  70–80

1959

16.9

  80+

447

3.9

Sex

  

  Men

5000

43.1

  Women

6591

56.9

Monthly household income

  

  Lowest quintile

3108

26.8

  2nd to 4th quintile

5946

51.3

  Highest quintile

2355

20.3

Education

  

  Elementary school

4644

40.1

  Middle school

1779

15.4

  High school

3111

26.8

  University or higher

1929

16.6

Residential area

  

  Urban

8124

70.1

  Rural

3467

29.9

Occupation

  

Administrator, management, and professional

883

7.6

Business and financial operations

548

4.7

Sales and related

1416

12.2

Farming, fishing, and forestry

1539

13.3

Installation, maintenance, and repair

1089

9.4

Laborer

1208

10.4

Unemployed

4761

41.1

2. Health examination variable

  

Obesity

  

  Underweight

7223

62.3

  Normal

3980

34.3

  Obesity

357

3.1

Hypercholesterolemia

  

  No

8978

77.5

  Yes

1695

14.6

Hypo-HDL-cholesterolemia

  

  No

7613

65.7

  Yes

3122

26.9

Hypertriglycemia

  

  No

7257

62.6

  Yes

1547

13.4

Anemia

  

  No

9778

84.4

  Yes

1150

9.9

Metabolic syndrome

  

  No

6782

58.5

  Yes

4809

41.5

3. Comorbidities

  

Hypertension

  

  No

8033

69.3

  Yes

3472

30.0

Diabetic mellitus

  

  No

10237

88.3

  Yes

1267

10.9

Osteoarthritis

  

  No

9596

82.8

  Yes

1907

16.5

Rheumatoid arthritis

  

  No

11161

96.3

  Yes

342

3.0

Atopic dermatitis

  

  No

11339

97.8

  Yes

163

1.4

Asthma

  

  No

11083

95.6

  Yes

421

3.6

4. Health behavioral risk factors

  

Lifetime smoker

  

  No

6797

58.6

  Yes

4704

40.6

Binge alcohol user

  

  No

8375

72.3

  Yes

3140

27.1

Physical activity of moderate intensity

  

  never

11078

95.6

  more than once in a week

394

3.4

Coffee consumption

  

  Never

1393

12.0

  1–6 cups per week

2236

19.3

  ≥7 cups per week

6476

55.9

Stress

  

  Least stressful

2249

19.4

  Moderately stressful

8671

74.8

  Extremely stressful

557

4.8

Sun exposure

  

  <5 hr/day

8182

70.6

  ≥5 hr/day

3286

28.4