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Table 1 Descriptive statistics for predictors and outcomes for 617a children included in a matched cohort study with follow-up from birth to 12–13 years in the Stavanger area, Norway

From: Body mass index and physical activity in early childhood are associated with atopic sensitization, atopic dermatitis and asthma in later childhood

Predictors

n

Mean

SD

Birthweight (kg)

606

3.37

0.71

BMI 3 months

541

16.4

1.52

BMI 6 months

559

17.2

1.53

BMI 1 year

559

17.2

1.49

BMI 4 years

477

15.9

1.43

BMI first follow-upb

610

18.0

2.91

BMI second follow-upc

466

18.8

3.00

Waist circumference (cm) first follow-up

610

63.5

7.80

Waist circumference (cm) second follow-up

466

68.0

7.72

Triceps skinfold (mm) first follow-up

605

11.7

4.63

Triceps skinfold (mm) second follow-up

465

12.1

4.81

Waist-to-height ratio first follow-up

610

0.42

0.04

Waist-to-height ratio second follow-up

466

0.43

0.05

Subscapular skinfold (mm) second follow-up

450

8.21

3.24

 

n

%

Physical activity 3-6 years

601

 

 Low

72

12

 Normal

370

62

 High

159

26

Physical activity 6–10 years

596

 

 Low

99

17

 Normal

376

63

 High

121

20

Outcome

  

Atopic sensitization at second follow-upd

133/388

34

Allergic rhinoconjunctivitis ever by first follow-up

131/595

22

Atopic dermatitis ever by first follow-up

149/596

25

Asthma ever by first follow-up

53/590

9

Current asthma at second follow-up

37/458

8

  1. SD standard deviation, BMI body mass index (kg/m2)
  2. aDue to missing values and variation in response, the number of participants varied between the different predictors and outcomes
  3. bFirst follow-up: 10.8 years (girls), 11.8 years (boys)
  4. cSecond follow-up: 12.8 years
  5. d99 (25.5 %) had high grade atopic sensitization (sum of specific IgE ≥ 3.9 kU/l)