Table 1 Characteristics of the girls in the sample.

From: Consumption of ultraprocessed foods and breast density in adolescence

Variables (n = 330)

x̅ (SD)

Birth weight (kg)

3.36 (0.42)

Age at time of DXA (years)

15.91 (0.76)

Breast composition (n = 329)

  AFGV (cm3)

225.38 (108.23)

  FGV (%)

48.59 (15.57)

Anthropometric

BMI z score at 4 years post menarchea

0.92 (1.03)

Nutritional status, n (%)

  Low and normal weight

177 (53.64)

  Overweight

101 (30.61)

  Obesity

52 (15.76)

  Percentage of total fat mass 4 years after menarche (%)

32.9 (6.65)

Gynecological

  Age at menarche (years)

11.8 (0.85)

Stage of the menstrual cycle 4 years after menarche, n (%)

  Follicular stage

230 (70.34)

  Luteal stage

80 (24.46)

  Irregular cycle

17 (5.20)

Contraceptives, n (%) (n = 245)

  Yes

72 (29.39)

  No

173 (70.61)

Lifestyle

 

Physical activity (IPAQ), n (%)

  Low

169 (51.37)

  Moderate

129 (39.21)

  High

31 (9.42)

Smoke, n (%)

  Yes

159 (48.33)

  No

170 (51.67)

Maternal data

 

Maternal education, n (%)

   > 12 years

83 (25.3)

   ≤ 12 years

245 (74.7)

  Mother’s DM (%FGV) (n = 233)

10.32 (5.14)

  N°24H surveys (n = 323)

3.4 (1.63)

Breakdown N° of 24H surveys, n (%)

  1

25 (7.74)

  2

84 (26.01)

  3

83 (27.7)

  4

58 (17.96)

  5 or more

73 (22.60)

Total calories per day

1849.63 (461.49)

Total grams per day

1788.76 (411.17)

Percentage of total kcal derived from the NOVA 1 group

30.11 (10.60)

Percentage of total kcal derived from the NOVA 2 group

8.36 (4,38)

Percentage of total kcal derived from the NOVA 3 group

19.86 (9.34)

Percentage of total kcal derived from the NOVA 4 group

41.67 (12.63)

Percentage of grams derived from the NOVA 1 group

53.76 (13.48)

Percentage of grams derived from the NOVA 2 group

1.49 (0.86)

Percentage of grams derived from the NOVA 3 group

7.23 (3.78)

Percentage of grams derived from the NOVA 4 group

37.52 (13.41)

  1. Abbreviations: DXA, dual-energy x-ray absorptiometry; SD, standard deviation; FGV (%), percentage of fibroglandular volume; AFGV, absolute fibroglandular volume; 24H, 24-h dietary recall; Kcal, calories; UPF, ultra-processed food.
  2. aBMI categories defined according to: de Onis M, Onyango AW, Borghi E, Siyam A, Nishida C, Siekmann J. Development of a WHO growth reference for school-aged children and adolescents. Bull World Health Organ. 2007 Sep;85(9):660–667. https://doi.org/10.2471/blt.07.043497.