Supplementary Figure 1. Flowchart of the participants included in the prospective analysis. The Young Lives Study, Younger Cohort, Peru.
Younger Cohort
(n=2,052)
Excluded because of prematurity
(n=549)
Potential Participants
(n=1,503)
Excluded because of missing values
(n=529)
Overweight (n=132)
Obesity (n=34)
Overnutrition (n=166)
Included at Baseline
(n=974)
Outcome: Overweight
Incidence Analysis
(n=808)
Outcome: Obesity
Incidence Analysis
(n=940)
Outcome: Overnutrition
Incidence Analysis
(n=808)

Supplementary Figure 2: Time at which variables were assessed and number of children-years included in the analysis according to each outcome.

Supplementary Table 1. Excluded and included participants due to missing values. The
Young Lives Study, Younger Cohort, Baseline, Peru.
Variable Excluded (%) Included (%) p¥
Mothers
Maternal BMI n=516 n=956
Normal Weight
Overweight
72.09
23.45
54.71
34.73 <0.001
Obesity
Maternal Education
None/Primary
High School
Higher Education
4.46 n=497
79.28
17.51
3.22
10.56 n=926
33.91
43.84
22.25
<0.001
Wealth Index
Bottom
Middle
Top
Location
Urban
Rural
Children
Gender
Male
Female n=528
61.36
31.82
6.82 n=529
38.00
62.00 n=529
46.31
53.69 n=973
22.92
35.15
41.93 n=974
79.57
20.43 n=974
50.10
49.90
<0.001
<0.001
0.160
Age
<1 year
≥1 year
Birth Weight
2500-4000
≤2500
≥4000
Breastfeeding
Yes
No
BMI
Normal Weight
Overweight
Obesity
Hospitalised after birth
Yes
No
Birth Order
1st
2nd
≥3rd
Delivery
No Caesarean section
Caesarean section
¥Chi2 test n=529
49.15
50.85 n=343
89.21
5.54
5.25 n=527
99.81
0.19 n=503
91.65
6.16
2.19 n=527
1.52
98.48 n=516
18.99
19.38
61.63 n=4
100.00
0.00 n=974
48.15
51.85 n=927
91.26
2.27
6.47 n=961
99.27
0.73 n=964
87.14
10.48
2.39 n=961
9.47
90.53 n=947
42.13
26.50
31.36 n=974
84.39
15.61
0.712
0.010
0.174
0.022
<0.001
<0.001
0.390

Supplementary Table 2. Sociodemographic characteristics of both mothers and children according to children nutritional status. The young lives study, Younger Cohort,
Baseline, Peru.
Normal Weight (%) Overweight (%) Obesity (%) p¥
Mothers
Maternal BMI
Normal Weight n=823
56.14 n=100
46.00 n=23
34.78
0.069 Overweight
Obesity
Maternal Education
None/Primary
33.90
9.96 n=798
35.84
41.00
13.00 n=95
16.84
43.48
21.74 n=23
34.78
0.005 High School
Higher Education
Wealth Index
Bottom
43.23
20.93 n=839
24.31
51.58
31.58 n=101
9.90
43.48
21.74 n=23
17.39
0.001 Middle
Top
Location
35.76
39.93 n=840
30.69
59.41 n=101
30.43
52.17 n=23
Urban
Rural
Children
Gender
Male
Female
Age
<1 year
≥1 year
Birth Weight
2500-4000
≤2500
≥4000
Breastfeeding
Yes
No
77.74
22.26 n=840
49.88
50.12 n=840
45.24
54.76 n=798
91.10
2.63
6.27 n=830
99.16
0.84
Hospitalized after birth n=830
Yes
No
Birth Order
1st
2nd
≥3rd
Delivery
9.52
90.48 n=816
41.05
26.72
32.23 n=840
No Caesarean section 85.60
Caesarean section
¥Chi2 test
14.40
94.06
5.94 n=101
52.48
47.52 n=32
68.32
31.68 n=97
93.81
0.00
6.19 n=98
100.00
0.00 n=98
9.18
90.82 n=100
50.00
24.00
26.00 n=101
76.24
23.76
82.61
17.39 n=23
43.48
56.52 n=23
69.57
30.43 n=22
86.36
0.00
13.64 n=23
100.00
0.00 n=23
8.70
91.30 n=22
45.45
31.82
22.73 n=23
69.57
30.43
0.001
0.725
<0.001
0.279
0.598
0.986
0.423
0.008