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Table 1 Sample characteristics according to independent variables (Number of participants and percentage). Pelotas 2004 birth cohort study

From: Dietary intake patterns of children aged 6 years and their association with socioeconomic and demographic characteristics, early feeding practices and body mass index

Variables N %
SEP (quintiles)
 1st (lower) 784 22.9
 2nd 716 21.0
 3rd 766 22.4
 4th 553 16.2
 5th (higher) 595 17.4
Maternal age at birth (years)
 18–35 2733 79.8
  < 18 324 9.5
  > 35 367 10.7
Children’s sex
 Male 1772 51.9
 Female 1645 48.1
Children’s skin colour
 White 2324 71.4
 Brown 502 15.4
 Black 428 13.2
Exclusive breastfeeding
 0–7 days 859 25.4
 8 days - <1 month 375 11.1
 1 - <3 months 1421 42.1
  ≥ 3 months 721 21.4
Age of introduction of complementary food
  ≥ 4 months 498 14.8
 1–3.9 months 1685 49.9
  < 1 month 1190 35.3
BMI at 6 years (z-score)
 Normal 2016 65.0
 Overweight 555 17.9
 Obese 533 17.2
  1. SEP Socioeconomic position, BMI Body mass index