Table 1 Asthma prevalence stratified by age.

From: Prevalence of asthma in preterm and associated risk factors based on prescription data from the Korean National Health Insurance database

Age (yr)

Term

Preterm

Relative Risk

Population

Asthma

Prevalence (%)

Population

Asthma

Prevalence (%)

0

7,264,218

503,212

6.93

99,139

8262

8.33

1.20 (1.18–1.23)***

1

7,264,218

1,623,888

22.35

99,139

26,706

26.94

1.21 (1.19–1.22)***

2

6,942,661

1,865,390

26.87

88,974

29,130

32.74

1.22 (1.20–1.23)***

3

6,583,351

1,731,872

26.31

78,573

23,889

30.40

1.16 (1.14–1.17)***

4

6,184,622

1,474,373

23.84

68,204

18,046

26.46

1.11 (1.09–1.13)***

5

5,772,663

1,103,919

19.12

57,981

12,261

21.15

1.11 (1.09–1.13)***

6

5,361,207

798,900

14.90

48,802

8241

16.89

1.13 (1.11–1.16)***

7

4,926,781

536,313

10.89

40,327

4963

12.31

1.13 (1.10–1.16)***

8

4,477,049

393,457

8.79

32,100

3234

10.07

1.15 (1.11–1.19)***

9

4,033,500

295,744

7.33

25,631

2115

8.25

1.13 (1.08–1.17)***

10

3,603,316

212,519

5.90

19,313

1300

6.73

1.14 (1.08–1.21)***

11

3,173,885

150,854

4.75

14,269

740

5.19

1.09 (1.01–1.17)*

12

2,720,664

98,489

3.62

10,150

420

4.14

1.14 (1.04–1.26)**

13

2,276,632

59,301

2.60

6685

217

3.25

1.25 (1.09–1.42)**

14

1,859,564

35,787

1.92

4455

117

2.63

1.36 (1.13–1.64)**

15

1,428,298

22,368

1.57

3183

64

2.01

1.29 (0.99–1.64)

16

969,159

15,240

1.57

2077

50

2.41

1.53 (1.14–2.02)**

17

500,546

7,074

1.41

930

9

0.97

0.68 (0.31–1.30)

  1. *p < .05; **p < .01; ***p < .001.