Skip to main content

Table 3 Baseline characteristics of participants exposed to quartile (Q1-Q4) daily average concentrations of non-methane hydrocarbons (NMHC)

From: Association of exposure to hydrocarbon air pollution with the incidence of atopic dermatitis in children

Variables

NMHC

N = 246,844

Q1

N = 55,312

Q2

N = 75,581

Q3

N = 54,687

Q4

N = 61,264

p-value

n

%

n

%

N

%

n

%

 

Age

mean, SDa

6.12

3.18

6.04

3.09

7.02

3.52

6.97

3.67

< 0.001

Boys

 

28,693

51.9

39,338

52.1

27,917

51.1

31,308

51.1

< 0.001

Monthly income (NTD)b

        

< 0.001

 

<  15,000

47,529

85.9

64,814

85.8

44,185

80.8

49,343

80.5

 
 

15,000 − 19,999

5766

10.4

8467

11.2

7931

14.5

8707

14.2

 
 

≥ 20,000

2017

3.65

2300

3.04

2571

4.70

3214

5.25

 

Urbanization levelc

        

< 0.001

 

1 (highest)

10,156

18.4

19,922

26.4

25,416

46.5

26,333

43.0

 
 

2

16,372

29.6

26,062

34.5

15,707

28.7

21,044

34.4

 
 

3

8878

16.1

19,178

25.4

9417

17.2

9540

15.6

 
 

4 (lowest)

19,906

36.0

10,419

13.8

4147

7.58

4347

7.10

 

Outcome

Atopic dermatitis

1046

1.89

1692

2.24

1878

3.43

2688

4.39

< 0.001

  1. Chi-square test; aOne-way ANOVA; SD standard deviation
  2. bMonthly income: New Taiwan Dollar (NTD), 1 NTD is equal to 0.03 USD
  3. cUrbanization level: The urbanization level was categorized by the population density of the residential area into 4 levels, with level 1 as the most urbanized and level 4 as the least urbanized
Back to article page

Italian Journal of Pediatrics

ISSN: 1824-7288

Contact us