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Table 1 Characteristics (in percentages, unless indicated otherwise) of the study population

From: Comorbidities of obesity in school children: a cross-sectional study in the PIAMA birth cohort

  Children with complete data on BMI status and health outcomes Children with complete data on the health outcomes Imputed data set
n = 3960
Gender n = 1997 n = 3120  
boys 50.3 51.3 51.7
Birth weight (grams) n = 1991 n = 3108  
mean (s.d.) 3522 (537) 3524 (535) 3507 (546)
Region n = 1997 n = 3120  
North 31.2 31.4 31.1
Central 42.1 41.7 40.0
West 26.7 26.9 28.9
Maternal education n = 1991 n = 3106  
Low 19.8 21.3 23.8
Intermediate 42.1 42.0 41.4
High 38.1 36.7 34.7
Breast feeding n = 1983 n = 3090  
Never 15.4 16.4 17.9
0-16 weeks 44.4 46.5 49.7
> 16 weeks 40.2 37.1 32.4
Smoking in the home at 1 year n = 1992
25.3
n = 3110
28.0
26.0
Smoking in the home at 8 years n = 1990
15.8
n = 3109
16.6
18.1
BMI status at 8 yrs n = 1997 n = 1997  
Thinness 7.0 6.9 8.3
Normal weight 78.7 78.8 75.7
Moderate overweight 11.7 11.7 12.1
Obesity 2.7 2.7 3.9
RAND score n = 1997 n = 3120  
mean (s.d.) 27.8 (3.5) 27.8 (3.5) 27.6 (3.6)
GP contact during last 2 months (yes) n = 1997 n = 3120  
  20.7 20.6 22.1
Not to school due to illness in last 2 months (≥ 1 day) n = 1997
27.8
n = 3120
28.1
29.4
Health-related limitations last 2 months (yes) n = 1997
16.3
n = 3120
16.3
17.4
Flu/serious cold last 12 months (yes) n = 1997
13.3
n = 3120
13.4
15.2
Throat infection last 12 months (yes) n = 1997
4.9
n = 3120
4.7
5.7
Ear infection last 12 months (yes) n = 1997
9.1
n = 3120
8.6
9.5
Bronchitis last 12 months (yes) n = 1997
2.7
n = 3120
2.6
3.5
Antibiotics in last 12 months (yes) n = 1997
15.8
n = 3120
15.7
17.2