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Table 1 Summary of Selected Characteristics of CHS FeNO Study Participants

From: Genetic and epigenetic susceptibility of airway inflammation to PM2.5 in school children: new insights from quantile regression

 

N (%)

Distribution of FeNO

Median (IQR)

0.2

0.4

0.6

0.8

Mean (SD)

P-values

Age [mean(range)]

9.3 (6.4,11.7)

9.75 (8.4)

6.5

8.5

11.3

17.3

11.1 (1.9)

<0.001

Gender

 Girl

489 (52%)

10.2(7.9)

6.6

8.8

11.5

17

11.2 (1.9)

0.72

 Boy

451 (48%)

9.3(8.85)

6.4

8.3

10.8

17.9

11 (2)

Ethnicity

 Hispanic White

607 (64.6%)

10(8.55)

6.6

8.5

11.9

17.8

11.4 (2)

0.16

 Non-Hispanic White

333 (35.4%)

9.5(7.3)

6.3

8.5

10.9

16.5

10.7 (1.9)

Asthma

 No

807 (85.9%)

9.6(7.75)

6.4

8.4

11.1

16.3

10.6 (1.8)

<0.001

 Yes

133 (14.1%)

10.7(22)

7

8.9

14.2

36.4

14.8 (2.4)

History of Respiratory Allergy

 No

418 (44.5%)

9.5(5.975)

6.6

8.4

10.5

14.7

10.2 (1.8)

<0.001

 Yes

522 (55.5%)

10.15(10.575)

6.4

8.6

12.8

21.6

11.9 (2)

Exposure to Secondhand Smoke

 No

909 (96.7%)

9.7(8.4)

6.5

8.5

11.3

17.3

11.1 (1.9)

0.92

 Yes

31 (3.3%)

10.8(7.65)

6.5

8.4

12.4

15.2

11 (2)

Body mass index

 Underweight (< 5th percentile)

11 (1.2%)

13.5(6.3)

7.5

11.2

13.8

14.4

12.5 (2)

0.90

 Normal (5th to <85th percentile)

550 (58.5%)

9.7(8.3)

6.6

8.5

11.1

17.1

11 (1.9)

 Overweight (85th to <95th percentile)

183 (19.5%)

9.5(8)

6.4

8.2

10.9

17.8

11.1 (2)

 Obese (≥ 95th percentile)

191 (20.3%)

10(8.35)

6.5

8.7

12.1

18.2

11.3 (2)

Parental Education

 <12th grade

238 (25.3%)

11.15(8.925)

7.4

9.7

13.2

19.0

12.3 (1.9)

0.08

 12th grade

163 (17.3%)

9.6(8.85)

6.1

7.7

11.3

17.5

11 (2.1)

 Some college

302 (32.1%)

9.3(7.375)

6.4

8.1

10.4

16.6

10.9 (2)

 College

125 (13.3%)

9.3(8.5)

6.3

8.4

10.98

16.0

10.6 (1.9)

 Some graduate

112 (11.9%)

9.35(7.45)

6.4

8.0

10.8

16.5

10.2 (1.8)

Annual family income

 <$15,000

275 (29.3%)

10.7(9.5)

7.2

9.5

12.9

19.4

12.3 (2)

0.003

 $15,000 - $49,999

240 (25.5%)

10.35(8.2)

6.5

8.7

12.4

18.3

11.4 (2)

 ≥$50,000

425 (45.2%)

9.1(6.9)

6.3

8.1

10.3

15.7

10.3 (1.9)