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Table 2 Selected characteristics of included and excluded boys

From: Associations between exposure to perfluoroalkyl substances and body fat evaluated by DXA and MRI in 109 adolescent boys

 

na

Included boys

n

Excluded boys

P-valueb

Median (25th-75th percentiles)

Median (25th-75th percentiles)

Age (years)

114

12.5 (11.4–13.1)

286

12.2 (11.4–13.1)

0.372

Tanner stage

105

 

250

  

 1

23

 

86

  

 2

34

 

74

  

 3

30

 

52

  

 4

16

 

27

  

 5

2

 

11

 

0.008

Height (cm)

114

157.9 (150.4–166.7)

285

156.1 (148.6–163.9)

0.157

Height SDS

114

0.10 (-0.66–0.81)

285

0.01 (-0.88–0.70)

0.261

Weight (kg)

114

44.9 (38.4–50.9)

285

43.7 (37.4–50.0)

0.171

Weight SDS

114

-0.004 (-0.72–0.77)

285

-0.12 (-0.77–0.63)

0.266

BMI (kg/m2)

114

17.9 (16.6–19.8)

285

17.8 (16.5–19.5)

0.388

BMI SDS

114

-0.19 (-0.79–0.62)

285

-0.13 (-0.81–0.57)

0.579

  1. Boys who participated in the pubertal follow-up were included in the present study if they also had a pubertal MRI performed, those without an MRI were excluded
  2. Please note that five boys did not have a PFAS measurement and could thus not be included in the statistical analyses
  3. Differences between the two groups were tested using Chi-squared test for categorical data, Mann–Whitney U-test for non-parametric data and Student’s t-test for parametric data. Significant values (P < 0.05) are highlighted in bold