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Table 1 The demographic information of study population

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

N = 246,844

 

n

%

Gender

Boys

126,256

51.6

Age, years

mean, SD

6.50

3.39

≦6

126,967

51.4

7–12

101,653

41.2

> 12

18,224

7.38

Monthly income (NTD)a

<  15,000

205,871

83.4

15,000 − 19,999

30,871

12.5

≥ 20,000

10,102

4.09

Urbanization levelb

1 (highest)

81,827

33.2

2

79,185

32.1

3

47,013

19.1

4 (lowest)

38,819

15.7

Exposure

 THC level (daily average)

mean, SD

2.43

0.23

 NMHC level (daily average)

mean, SD

0.40

0.17

 CH4 level (daily average)

mean, SD

2.03

0.13

 Follow years

mean, SD

10.6

3.02

Outcome

 Atopic dermatitis

 

7304

2.96

  1. SD standard deviation
  2. aMonthly income, New Taiwan Dollar (NTD), 1 NTD is equal to 0.03 USD
  3. bUrbanization 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. THC total hydrocarbons, NMHCs non-methane hydrocarbons, CH4 methane
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Italian Journal of Pediatrics

ISSN: 1824-7288

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