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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)