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Table 1 Characteristics of Isle of Wight Birth Cohort participants at 10 and 18 years.

From: Duration of breastfeeding is associated with leptin (LEP) DNA methylation profiles and BMI in 10-year-old children

Characteristic IOWBC Participants at 10 years (n = 297) IOWBC Participants at 18 years (n = 305)
Child sex (female) 190 (64.0%) 209 (68.5%)
Maternal socioeconomic status
 1 (lowest) 41 (13.8%) 49 (16.1%)
 2 60 (20.2%) 52 (17.0%)
 3 89 (29.9%) 88 (28.9%)
 4 82 (27.6%) 85 (27.9%)
 5 (highest) 25 (8.4%) 31 (10.2%)
No maternal smoking during pregnancy 238 (80.1%) 250 (82.0%)
Gestational age < 38 weeks 12 (4.0%) 15 (4.9%)
Overweight (BMI > 19.8 at 10 years, > 25 at 18) 62 (20.9%) 83 (27.2%)
Never breastfed 38 (12.8%) 48 (15.7%)
BMI trajectory
 Normal (reference) 211 (71%) 215 (70.5%)
 Delayed overweight (trajectory 2) 41 (13.8%) 48 (15.8%)
 Early transient overweight (trajectory 3) 33 (11.1%) 30 (9.8%)
 Early persistent obesity (trajectory 4) 12 (4.1%) 12 (3.9%)
  1. Descriptive statistics on exposure and covariates of participants included in the study. This is given as the number of participants in each category and as a percentage for each characteristic. Note that for the overweight category, different BMI cut-offs are used at 10 or 18 years, as defined by the International Obesity Taskforce