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Table 1 General sample characteristics

From: Effects of public and private health insurance on medical service utilization in the National Health Insurance System: National panel study in the Republic of Korea

 

1st Wave, 2008 (n = 13,798)

2nd Wave, 2009 (n = 14,222)

3rd Wave, 2010 (n = 13,336)

4th Wave, 2011 (n = 12,347)

N

(%)

N

(%)

N

(%)

N

(%)

Gender

 Men

6,584

(47.7)

6,800

(47.8)

6,377

(47.8)

5,894

(47.7)

 Women

7,214

(52.3)

7,422

(52.2)

6,959

(52.2)

6,453

(52.3)

Age

 20–29

1,943

(14.1)

2,006

(14.1)

1,851

(13.9)

1,407

(11.4)

 30–39

2,893

(21.0)

2,828

(19.9)

2,528

(19.0)

2,138

(17.3)

 40–49

2,953

(21.4)

3,071

(21.6)

2,855

(21.4)

2,715

(22.0)

 50–59

2,381

(17.3)

2,440

(17.2)

2,277

(17.1)

2,235

(18.1)

 60 or older

3,628

(26.3)

3,877

(27.3)

3,825

(28.7)

3,852

(31.2)

Chronic disease

 Yes

6,474

(46.9)

7,642

(53.7)

7,626

(57.2)

7,630

(61.8)

 No

7,324

(53.1)

6,580

(46.3)

5,710

(42.8)

4,717

(38.2)

Marital status

 Single

2,300

(16.7)

2,569

(18.1)

2,383

(17.9)

2,043

(16.6)

 Married couple

9,955

(72.2)

10,034

(70.6)

9,407

(70.5)

8,805

(71.3)

 Divorced or Separated

392

(2.8)

410

(2.9)

397

(3.0)

386

(3.1)

 Separation by death

1,151

(8.3)

1,209

(8.5)

1,149

(8.6)

1,113

(9.0)

Education

 Elementary School or less

2,955

(21.4)

2,996

(21.1)

2,868

(21.5)

2,718

(22.0)

 Middle School to associate

1,565

(11.3)

1,576

(11.1)

1,487

(11.2)

1,419

(11.5)

 High School to associate

4,462

(32.3)

4,519

(31.8)

4,206

(31.5)

3,892

(31.5)

 College Degree or higher

4,816

(34.9)

5,131

(36.1)

4,775

(35.8)

4,318

(35.0)

Household income

 4st quartile (highest)

3,550

(25.7)

3,558

(25.0)

3,336

(25.0)

3,364

(27.3)

 3st quartile

3,471

(25.2)

3,556

(25.0)

3,354

(25.2)

2,944

(23.8)

 2st quartile

3,390

(24.6)

3,559

(25.0)

3,319

(24.9)

2,934

(23.8)

 1st quartile (lowest)

3,387

(24.6)

3,549

(25.0)

3,327

(25.0)

3,105

(25.2)

Healthcare covered by NHI

 Yes

13,207

(95.7)

13,563

(95.4)

12,642

(94.8)

11,732

(95.0)

 No (medical aid)

591

(4.3)

659

(4.6)

694

(5.2)

615

(5.0)

Purchase of PHI

 Yes

10,983

(79.6)

11,612

(81.7)

10,537

(79.0)

9,973

(80.8)

 No

2,815

(20.4)

2,610

(18.4)

2,799

(21.0)

2,374

(19.2)

The number of days receiving inpatient care for a year

0.13 ± 0.50 (0–12)

0.16 ± 0.60 (0–22)

0.19 ± 0.68 (0–24)

0.19 ± 0.79 (0–41)

The number of visits receiving outpatient care for a year

11.91 ± 19.14 (0–308)

13.05 ± 21.15 (0–455)

14.60 ± 22.59 (0–350)

15.97 ± 24.49 (0–351)

  1. Note: NHI National Health Insurance, PHI Private Health Insurance
  2. The number of days receiving inpatient care and the number of visits receiving outpatient care are presented as mean ± SD (range)