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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